Artist's concept of the Starship's former design following stage separation, 2018
|Designer||Elon Musk (lead designer)|
Tom Mueller (engine designer)
|Country of origin||United States|
|Spacecraft type||fully reusable, cargo (crewed option later)|
|Launch mass||1,320,000 kg (2,910,000 lb) |
|Dry mass||120,000 kg (260,000 lb)(target)|
|Payload capacity||100,000 kg (220,000 lb)(initally; target is 150,000 kg)|
|Length||50 m (160 ft)|
|Diameter||9 m (30 ft)|
|Built||3 test articles|
|Engines||3 Raptor (sea-level nozzle) + 3 Raptor vacuum|
|Thrust||12,000 kN; 2,600,000 lbf (1,200 tf)|
|Specific impulse||vacuum engine: 380 s |
sea-level engine: 330 s (at sea level) 355 s (in vacuum)
4 / LOX
The SpaceX Starship is a fully reusable second stage and space vehicle being privately developed by SpaceX. It is being designed to be a long-duration cargo- and passenger-carrying spacecraft. While currently it is tested on its own, it will be used on orbital launches with an additional booster stage, the Super Heavy, where Starship would serve as the second stage on a two-stage-to-orbit launch vehicle. The combination of spacecraft and booster is called Starship as well. Beginning in mid-2019, prototype versions are being flown with Starship as an independent rocket in its own right—without any launch vehicle booster stage at all—as part of an extensive suborbital flight testing program to get launch and landing working and iterate on a variety of design details, particularly with respect to atmospheric reentry of the vehicle.
Integrated system testing of Starship began in March 2019 with the addition of a single Raptor rocket engine to the first flight-capable propellant structure, Starhopper. Starhopper was used through August 2019 for static testing and low-altitude, low-velocity flight testing of vertical launches and landings in July/August. Two additional test articles, Starship orbital prototypes, are being built by competing teams in Texas and in Florida. They are planned to be used for high-altitude, high-velocity testing beginning in late 2019. All test articles have a 9-meter (30 ft)-diameter stainless steel hull.
The Starship design concept for the 9-meter rocket was unveiled in September 2017 but work by SpaceX on the engine had begun much earlier and previous larger concepts had been discussed since 2013. See the fuller history for the entire two-stage launch vehicle.
The Starship engine layout, reentry aerodynamic surface designs, and even the basic material of construction have each changed markedly since the initial public unveiling of the 9-meter (30 ft) diameter rocket in 2017, in order to balance objectives such as payload mass, landing capabilities, and reliability. The initial design at the unveiling showed the ship with six Raptor engines (two sea-level, four vacuum), aerodynamic control surfaces of a delta wing with split flaps, and a plan to build both stages of the launch vehicle out of carbon composite materials.
By late 2017, SpaceX added a third sea-level engine to the conceptual design to increase engine-out capability and allow landings with greater payload mass, bringing the total number of engines to seven. Seven engines, three sea-level and four vacuum, remained the design until September 2018, when a new version of the design was shown at the announcement of the #dearMoon project. SpaceX indicated that early flights would happen with exclusively sea-level nozzle engines and showed animations depicting Starship with seven identical Raptor engines on the planned 2023 mission, the same engines to be used in the design of the booster, now called Super Heavy. By late 2018, the control surface concept for the second stage/spaceship had been redesigned from two small side fin protrusions of the delta wing to three rear fins—two of them actuated and one fixed—and two smaller front fins added for greater control authority during atmospheric entry. All three of the rear fins in the 2018 design were also intended to serve as landing legs.
In January 2019, Elon Musk announced that the Starship would no longer be constructed out of carbon fiber, and that stainless steel would be used instead to build the Starship. Musk cited several reasons including cost, strength, and ease of production to justify making the switch.
In May 2019, the Starship design changed back to just six Raptor engines, with three optimized for sea-level and three optimized for vacuum. By late May 2019, the first prototype, Starhopper, was preparing for untethered flight tests in South Texas, while two orbital prototypes were under construction, one in South Texas begun in March and one on the Florida space coast begun before May. The build of the first Super Heavy booster stage was projected to be able to start by September. At the time, neither of the two orbital prototypes yet had aerodynamic control surfaces nor landing legs added to the under construction tank structures, and Musk indicated that the design for both would be changing once again. On 21 September 2019, the externally-visible "moving fins" began to be added to the Mk1 prototype, giving a view into the promised mid-2019 redesign of the aerodynamic control surfaces for the test vehicles.
In June 2019, SpaceX publicly announced discussions had begun with three telecom companies for using Starship, rather than Falcon 9, for launching commercial satellites for paying customers in 2021. No specific companies or launch contracts were announced at that time.
The Starhopper made its initial flight test, a "hop" of around 20 m (66 ft) altitude, in July 2019 and a second and final "hop" in August, reaching an altitude of around 150 m (490 ft) and landing around 100 m (330 ft) from the launchpad.
SpaceX completed most of the Boca Chica prototype, the Starship Mk1, in time for Musk's next public update in September 2019. Watching the construction in progress before the event, observers online circulated photos and speculated about the most visible change, a move to two tail fins from the earlier three. During the event, Musk added that landing would now be accomplished on six dedicated landing legs, following a re-entry protected by glass heat tiles. Updated specifications were provided: when optimized, Starship was expected to mass at 120,000 kg (260,000 lb) empty and be able to initially transport a payload of 100,000 kg (220,000 lb) with an objective of growing that to 150,000 kg (330,000 lb) over time. Musk suggested that an orbital flight might be achieved by the fourth or fifth test prototype in 2020, using a Super Heavy booster in a two-stage-to-orbit launch vehicle configuration, and emphasis was placed on possible future lunar missions.
Starship is a 9-meter-diameter (30 ft), 50-meter-tall (164 ft), fully reusable spacecraft design with a dry mass of 120,000 kg (264,555 lb), powered by six methane/oxygen-propellant Raptor engines. Total Starship thrust is approximately 12,000 kN (2,600,000 lbf).
Unusual for previous launch vehicle and spacecraft designs, Starship is to function both as a second stage to reach orbital velocity on launches from Earth, and will also be used in space as an on-orbit long-duration spacecraft.
The Starship design is intended to be fully reusable even when used as a second stage for orbital ascent from Earth. Starship is being designed so as to be capable of reentering Earth's atmosphere from orbital velocities and landing vertically, with a design goal of rapid reusability.
As announced in May 2019, Starship will use three sea-level optimized Raptor engines and three vacuum-optimized Raptor engines. These sea-level engines are identical to the engines on the booster, Super Heavy. Transport use in space is expected to utilize a vacuum-optimized Raptor engine variant to optimize specific impulse (Isp) to approximately 380 s (3.7 km/s).
Starship is planned to eventually be built in at least three operational versions:
- Spaceship: a large, long-duration spacecraft capable of carrying passengers or cargo to interplanetary destinations, to LEO, or between destinations on Earth.
- Satellite delivery spacecraft: a vehicle able to transport and place spacecraft into orbit, or handle the in-space recovery of spacecraft and space debris for return to Earth or movement to another orbit. In the 2017 early design concept, this was shown with a large cargo bay door that can open in space to facilitate delivery and pickup of cargo.
- Tanker: a cargo-only propellant tanker to support the refilling of propellants in Earth orbit. The tanker will enable launching a heavy spacecraft to interplanetary space as the spacecraft being refueled can use its tanks twice, first to reach LEO and afterwards to leave Earth orbit. The tanker variant, also required for high-payload lunar flights, is expected to come only later; initial in-space propellant transfer will be from one standard Starship to another.
- able to return from Earth orbit and land near the launch mount using retropropulsive landing and the reusable launch vehicle technologies developed earlier by SpaceX
- landing reliability is projected by SpaceX to ultimately be able to achieve "airline levels" of safety due to engine-out capability.
- rendezvous and docking operations will be automated
- on-orbit propellant transfers from Starship tankers to Starship spaceships or cargo spaceships, but initially from one standard orbital Starship to another.
- a Starship and its payload is intended to be able to transit to the Moon or fly to Mars after on-orbit propellant loading
- stainless steel structure and tank construction. Its strength-to-mass ratio is comparable to or better than the earlier SpaceX design alternative of carbon fiber composites across the anticipated temperature ranges, from the low temperatures of cryogenic propellants to the high temperatures of atmospheric reentry
- some parts of the craft will be built with a stainless steel alloy that "has undergone [a type of] cryogenic treatment, in which metals are ... cold-formed/worked [to produce a] cryo-treated steel ... dramatically lighter and more wear-resistant than traditional hot-rolled steel."
- methox pressure fed hot gas thrusters for attitude control, including the final pre-landing pitch-up maneuver from belly flop to tail down. Initial prototypes are using cold gas nitrogen thrusters, which have a substantially less-efficient mass efficiency, but are expedient for quick building to support early prototype flight testing.
- a thermal protection system against the harsh conditions of atmospheric reentry. This will include ceramic tiles, (after earlier evaluating a double stainless-steel skin with active coolant flowing in between the two layers or with some areas additionally containing multiple small pores that will allow for transpiration cooling.) Options under study included hexagonal ceramic tiles that could be used on the windward side of Starship.
- as envisioned in the 2017 design unveiling, the Starship is to have a pressurized volume of approximately 1,000 m3 (35,000 cu ft), which could be configured for up to 40 cabins, large common areas, central storage, a galley, and a solar flare shelter for Mars missions plus 12 unpressurized aft cargo containers of 88 m3 (3,100 cu ft) total.
- flexible design options; for example, a possible design modification to the base Starship—expendable 3-engine Starship with no fairing, rear fins, nor landing legs—to optimize mass ratio for interplanetary exploration with robotic probes.
According to Musk, when Starship is used for BEO launches to Mars, the functioning of the overall expedition system will necessarily include propellant production on the Mars surface. He says that this is necessary for the return trip and to reuse the spaceship to keep costs as low as possible. He also says that lunar destinations (circumlunar flybys, orbits and landings) will be possible without lunar-propellant depots, so long as the spaceship is refueled in a high-elliptical orbit before the lunar transit begins. Some lunar flybys will be possible without orbital refueling as evidenced by the mission profile of the #dearMoon project.
Starship specifications (planned)
- Capacity: ≤ 100 people / 150 t payload
- Diameter: 9 m (29 ft 6 in) 
- Height: 50 m (164 ft 1 in) 
- Volume: 1,000 m3 (35,000 cu ft) 
- Empty weight: 120,000 kg (264,555 lb) 
- Gross weight: 1,335,000 kg (2,943,171 lb) [better source needed]
- Fuel capacity: 1,100,000 kg (2,400,000 lb)
- Powerplant: 3 × Raptor rocket engine (sea-level optimized)
- Powerplant: 3 × Raptor rocket engine (vacuum optimized)
Concerning shielding against ionizing radiation, Musk has stated that the radiation will lead to an increased risk of cancer but said he thinks "it's not too big of a deal". Musk has been criticized for not addressing ionizing radiation in more detail.
Two test articles were being built by March 2019, and three by May. The low-altitude, low-velocity Starship test flight rocket was used for initial integrated testing of the Raptor rocket engine with a flight-capable propellant structure, and was slated to also test the newly designed autogenous pressurization system that is replacing traditional helium tank pressurization as well as initial launch and landing algorithms for the much larger 9-metre-diameter (29 ft 6 in) rocket. SpaceX originally developed their reusable booster technology for the 3-meter-diameter Falcon 9 from 2012 to 2018. The Starhopper prototype was also the platform for the first flight tests of the full-flow staged combustion methalox Raptor engine, where the hopper vehicle was flight tested with a single engine in July/August 2019, but could be fitted with up to three engines to facilitate engine-out tolerance testing.
The high-altitude, high-velocity 'Starship orbital prototypes' (Mk1 and Mk2) are planned to be used to develop and flight test thermal protection systems and hypersonic reentry control surfaces. Each orbital prototype is expected to be outfitted with more than three Raptor engines.
The construction of the initial test article—the "Starship test flight rocket" "test hopper," "Starship Hopper" or "Starhopper" —was begun in early December 2018 and the external frame and skin was complete by 10 January 2019. Constructed outside in the open on a SpaceX property just two miles (3.2 km) from Boca Chica Beach in South Texas, the external body of the rocket rapidly came together in less than six weeks. Originally thought by watchers of construction at the SpaceX South Texas Launch Site to be the initial construction of a large water tower, the stainless steel vehicle was built by welders and construction workers in more of a shipyard form of construction than traditional aerospace manufacturing. The full Starhopper vehicle is 9 meters (30 ft) in diameter and was originally 39 meters (128 ft) tall in January 2019. Subsequent wind damage to the nose cone of the vehicle resulted in a SpaceX decision to scrap the nose section, and fly the low-velocity hopper tests with no nose cone, resulting in a much shorter test vehicle.
From mid-January to early-March, a major focus of the manufacture of the test article was to complete the pressure vessel construction for the liquid methane and liquid oxygen tanks, including plumbing up the system, and moving the lower tank section of the vehicle two miles (3.2 km) to the launch pad on 8 March. Integrated system testing of the first prototype (Starhopper)—with the newly-built ground support equipment (GSE) at the SpaceX South Texas facilities— began in March 2019. "These tests involved fueling Starhopper with LOX and liquid methane and testing the pressurization systems, observed via icing of propellant lines leading to the vehicle and the venting of cryogenic boil off at the launch/test site. During a period of over a week, StarHopper underwent almost daily tanking tests, wet dress rehearsals and a few pre-burner tests."
Following initial integrated system testing of the Starhopper test vehicle with Raptor engine serial number 2 engine (Raptor S/N 2) in early April, the engine was removed for post-test analysis and several additions were made to the Starhopper. Attitude control system thrusters were added to the vehicle, along with shock absorbers for the non-retractable landing legs, and quick-disconnect connections for umbilicals. Raptor S/N 4 was installed in early June for fit checks, but the first test flight that is not tethered was expected to fly with Raptor S/N 5, until it suffered damage during testing at SpaceX Rocket Development and Test Facility, in McGregor, Texas. Subsequently Raptor S/N 6 was the engine used by Starship Hopper for its untethered flights.
The "hopper" test article was used to flight test a number of subsystems of the Starship and to begin to expand the flight envelope as the Starship design is iterated. Initial tests began in March 2019. All test flights of the "test hopper" or Starhopper were at low altitude. On 3 April 2019, SpaceX conducted a successful static fire test in Texas of its Starhopper vehicle, which ignited the engine while the vehicle remained tethered to the ground.
The first static fire test of the Starhopper test vehicle, with a single Raptor engine attached, occurred on 3 April 2019. The firing was a few seconds in duration, and was classed as successful by SpaceX. A second tethered test followed just two days later, on 5 April.
By May 2019, SpaceX was planning to conduct flight tests both in South Texas and on the Florida space coast. The FAA issued a one-year experimental permit in June 2019 to fly Starhopper at Boca Chica, including pre-flight and post-flight ground operations.
The maiden flight test of the Starhopper test vehicle, and also the maiden flight test of any full-flow staged combustion rocket engine ever, was on 25 July 2019, and attained a height of 18 m (59 ft). This was not a full-duration burn but a 22-second test. SpaceX is developing their next-generation rocket to be reusable from the beginning, just like an aircraft, and thus needs to start with narrow flight test objectives, while still aiming to land the rocket successfully to be used subsequently in further tests to expand the flight envelope. The second and final untethered test flight of the Starhopper test article was carried out on 27 August 2019, to a VTVL altitude of 150 m (490 ft).
Initial construction was underway by December 2018 when subsections of a Starship prototype—then referred to as the "Starship Mk1 orbital design" were stated to be under construction in California. Planned for high-altitude and high-velocity testing, the prototype was described to be taller than the Starhopper, have thicker skins, and a smoothly curving nose section.
By March 2019, construction of the full external structure and propellant tanks of the first prototype (Mk1) was well underway at the SpaceX "ad-hoc South Texas 'shipyard'," with an expectation that the vehicle could be complete and ready to begin testing as early as June. The new build of additional 9-meter diameter stainless steel structures in South Texas in late February was originally misattributed and thought to be a second and more substantial version of the Starhopper's upper section, following the destruction of the first Starhopper upper section, damaged by high winds in January. The Mk1 prototype will fly with three Raptor engines.
By May 2019, SpaceX revealed that they were building two high-altitude prototypes simultaneously, Mk1 in Texas and a second one, Mk2, in Florida. The two ships are being constructed by competing teams—that are required to share progress, insights, and build techniques with the other team, but neither team is required to use the other team's techniques. Construction of a Mk3 prototype will start approximately October 2019. A first orbital flight is not expected until Mk4 or Mk5 in mid 2020. Construction had begun on the Mk4 Starship in Florida by mid-October.
The Mk1/Mk2 prototype characteristics are:
- Size: 9 m (30 ft) diameter by approximately 50 m (160 ft) tall
- Mk1 empty mass: 200,000 kg (440,000 lb); Gross mass with propellant loaded: 1,400,000 kg (3,100,000 lb)
- Principal use: prototype test articles for engineering extension of the rocket's powered flight and atmospheric reentry flight envelope, to higher altitudes (>200 meters) and velocities than the two test flights of the first Starship test article—Starhopper—in summer 2019.
- Test methodology: vertical-takeoff and vertical-landing suborbital flights. One of many engineering objectives of the early test flights is to recover the test vehicle so that the vehicle can continue to be used on subsequent test flights to further extend the flight envelope. This is a test regime frequently seen with new aircraft, but has rarely been done with orbital spacecraft (the Space Shuttle is an exception), and has never been done on a launch vehicle second stage on powered test flights into the upper atmosphere.
- Propulsion: (initially) three Raptor methalox engines; may test with up to six engines later in the flight test program
- Attitude control
- for in-atmosphere control: two front actuated fins and two rear actuated fins (also referred to as "moveable fins"). Stability control is via rapid movement of both rear and forward fins during entry and landing, with vernier force control from the attitude control system thrusters. The control surfaces are actuated by "many powerful electric motors and batteries" More specifically, the Mk1 uses four Tesla 100 kWh (360 MJ) Lithium-ion battery packs and Tesla Model 3 motors to provide electrohydraulic actuation of the control surfaces. Musk is interested in iterating this to electromechanical actuation in subsequent versions (approximately Mk3) to eliminate the hydraulic accumulator and related inefficiencies.
- for out-of-atmosphere or upper atmosphere: cold gas nitrogen reaction control system (RCS) thrusters only
- Nose cone equipment: header tanks for landing, batteries, mounting and reaction control for the front movable fins
- Starship prototype flight test locations. Mk1: Texas; Mk2 Florida.
|Test №||Date||Vehicle||Orbital/suborbital (altitude)||Duration||Remarks|
|1||3 April 2019||Starhopper||Raptor/Starhopper integration hot fire test.||a few seconds||First static fire of Starhopper, single Raptor engine (production-level serial number (S/N) 2). Also was first hot fire test of Raptor in a vertical orientation.|
|2||5 April 2019||Starhopper||Suborbital ("hit tether limits", about 1 m or 3 ft)||a few seconds||Second tethered hop which hit tethered limits. With a single Raptor engine, S/N 2.|
|3||16 July 2019||Starhopper||Pad test static fire||full duration static fire (5 seconds)||Single-Raptor static fire occurred, using S/N 6 production-level Raptor. The test was followed several minutes later by the water fire suppression system on the pad coming on and the ignition of a discharge of methane around the Starhopper vehicle.|
|4||25 July 2019||Starhopper||Suborbital (20 m (66 ft))||about 22 seconds||First free flight test. Single Raptor engine, S/N 6. Was previously scheduled for the day before but was aborted. A test flight attempt on 24 July was scrubbed.|
|5||27 August 2019||Starhopper||Suborbital (150 m (490 ft))||About 57 seconds||Single Raptor engine, S/N 6. SpaceX called this the "150 meter Starhopper Test" on their livestream. Starhopper was retired after this launch, with some parts being reused for other tests. The test flight attempt on 26 August was scrubbed due to a problem with the Raptor engine igniters.|
|Future tests (What follows is only a subset of tests gleaned from various public statements; SpaceX has not publicly released a test plan)|
|6||late 2019||Starship prototype Mk1||Suborbital (20 km (66,000 ft))||With 3 Raptor engines.|
|TBD||Prototypes Mk1 and Mk2||Suborbital high-altitude, high-velocity testing||With 3 Raptor engines.|
|c. 2020||Prototype Mk3||Suborbital high-altitude, high-velocity testing||With 6 Raptor engines|
|c. 2020||Prototype Mk4||Orbital|
|c. 2020||Prototype Mk5||Orbital|
Starship is intended to become the mainline SpaceX orbital vehicle, as SpaceX has announced it intends to fully replace its existing Falcon 9 launch vehicle and Dragon space capsule fleet with Starship/Super Heavy during the early 2020s.:24:50–27:05
- Earth-orbit satellite delivery market. In addition to the standard external launch market that SpaceX has been servicing since 2013, the company intends to use Starship to launch the largest portion of its own satellite internet constellation, Starlink, with more than 12,000 satellites intended to be launched by 2026, more than six times the total number of active satellites on orbit in 2018.
- long-duration spaceflights in the cislunar region
- Mars transportation, both as cargo ships as well as passenger-carrying transport
- long-duration flights to the outer planets, for cargo and astronauts
In 2017, SpaceX mentioned the theoretical ability of using a boosted Starship to carry passengers on suborbital flights between two points on Earth in under one hour, providing commercial long-haul transport on Earth, competing with long-range aircraft. SpaceX however announced no concrete plans to pursue the two stage "Earth-to-Earth" use case. Over two years later, in May 2019, Musk floated the idea of using single-stage Starship to travel up to 10,000 kilometers (6,200 mi) on Earth-to-Earth flights at speeds approaching Mach 20 (25,000 km/h; 15,000 mph) with an acceptable payload saying it "dramatically improves cost, complexity & ease of operations."
- ITS launch vehicle — an earlier SpaceX concept for a much larger but similar spaceship
- List of Starship flights
- Starship / Big Falcon Rocket. Global Security. 20 April 2019.
- Elon Musk shares picture of new SpaceX rocket, which will take humans to Mars. Tech Explorist. 30 December 2018.
- Elon Musk. Tesla. Quote: "Elon is also the co-founder, CEO and lead designer of Space Exploration Technologies (SpaceX)"
- SpaceX propulsion guru Tom Mueller looks ahead to Raptor rocket engines for Mars. Alan Boyle, Geek Wire. 24 May 2018.
- Meet Tom Mueller: From Idaho logger to SpaceX co-founder who makes Elon Musk's rockets lift off. Catherine Clifford, CNBC News. 25 January 2019.
- Seedhouse, Erik (2013). SpaceX: Making Commercial Spaceflight a Reality. Springer Praxis Books. ISBN 9781461455141.
- "Thomas Mueller". LinkedIn. Retrieved 10 June 2019.
Senior Advisor (part-time) – Dates Employed: Jan 2019 – Present – Focus on new technology developments for SpaceX propulsion, including Mars main propulsion and surface power.
- Elon Musk on Twitter: 3 sea level optimized Raptors, 3 vacuum optimized Raptors (big nozzle)
- Elon Musk (28 September 2019). Starship Update (video). SpaceX. Event occurs at 1:45. Retrieved 30 September 2019 – via YouTube.
- Elon Musk on Twitter: 150mT for reference payload compared to other rockets.
- Matsunaga, Samantha (28 September 2019). "Five things we learned from Elon Musk's rollout of the SpaceX Starship prototype". Los Angeles Times. Retrieved 29 September 2019.
- Berger, Eric (29 September 2019). "Elon Musk, Man of Steel, reveals his stainless Starship". Ars Technica. Retrieved 30 September 2019.
- Lawler, Richard (20 November 2018). "SpaceX BFR has a new name: Starship". Engadget. Retrieved 21 November 2018.
Boyle, Alan (19 November 2018). "Goodbye, BFR … hello, Starship: Elon Musk gives a classic name to his Mars spaceship". GeekWire. Retrieved 22 November 2018.
Starship is the spaceship/upper stage & Super Heavy is the rocket booster needed to escape Earth’s deep gravity well (not needed for other planets or moons)
- "Starship". SpaceX. Retrieved 2 October 2019.
- Berger, Eric (15 May 2019). "SpaceX plans to A/B test its Starship rocketship builds". Ars Technica. Retrieved 20 May 2019.
- Starship is the spaceship/upper stage & Super Heavy is the rocket booster needed to escape Earth’s deep gravity well (not needed for other planets or moons), SpaceX, Elon Musk, 19 November 2018, accessed 10 August 2019.
- Chris Gebhardt (29 September 2017). "The Moon, Mars, & around the Earth – Musk updates BFR architecture, plans". Retrieved 30 March 2019.
- Gray, Tyler (28 May 2019). "SpaceX ramps up operations in South Texas as Hopper tests loom". NASASpaceFlight.com. Retrieved 30 May 2019.
- Henry, Caleb (28 June 2019). "SpaceX targets 2021 commercial Starship launch". SpaceNews. Retrieved 29 June 2019.
- Musk, Elon (1 March 2018). "Making Life Multi-Planetary". New Space. 6 (1): 2–11. Bibcode:2018NewSp...6....2M. doi:10.1089/space.2018.29013.emu.
- Foust, Jeff (29 September 2017). "Musk unveils revised version of giant interplanetary launch system". SpaceNews. Retrieved 28 September 2019.
- Elon Musk (29 September 2017). Becoming a Multiplanet Species (video). 68th annual meeting of the International Astronautical Congress in Adelaide, Australia: SpaceX. Retrieved 30 March 2019 – via YouTube.
- Jeff Foust (15 October 2017). "Musk offers more technical details on BFR system". SpaceNews. Retrieved 27 May 2019.
[Musk] added that, since the presentation last month, SpaceX has revised the design of the BFR spaceship to add a "medium area ratio" Raptor engine to its original complement of two engines with sea-level nozzles and four with vacuum nozzles. That additional engine helps enable that engine-out capability ... and will "allow landings with higher payload mass for the Earth to Earth transport function."
- "Elon Musk Says SpaceX Will Send Yusaku Maezawa (and Artists!) to the Moon". Wired. 18 September 2018. Archived from the original on 16 July 2019. Retrieved 27 May 2019.
- Eric Ralph (14 September 2018). "SpaceX has signed a private passenger for the first BFR launch around the Moon". Archived from the original on 14 September 2018. Retrieved 24 September 2019.
- Musk, Elon (17 September 2018). First Private Passenger on Lunar BFR Mission. SpaceX. Retrieved 18 September 2018 – via YouTube.
- D'Agostino, Ryan (22 January 2019). "Elon Musk: Why I'm Building the Starship out of Stainless Steel". Popular Mechanics. Retrieved 30 May 2019.
- Elon Musk [@elonmusk] (30 May 2019). "Wings/flaps & leg design changing again (sigh). Doesn't affect schedule much though" (Tweet) – via Twitter.
- Elon Musk [@elonmusk] (22 September 2019). "Adding the rear moving fins to Starship Mk1 in Boca Chica, Texas" (Tweet) – via Twitter.
- SpaceX installs two Starship wings ahead of Elon Musk’s Saturday update. Eric Ralph, TeslaRati. 22 September 2019.
- Elon Musk tweets a sneak peek at his vision for SpaceX’s Starship mega-rocket. Alan Boyle, GeekWire. 22 September 2019.
- Berger, Eric (26 July 2019). "SpaceX's Starship prototype has taken flight for the first time". Ars Technica. Retrieved 8 August 2019.
- Foust, Jeff (27 August 2019). "SpaceX's Starhopper completes test flight". SpaceNews. Retrieved 28 August 2019.
- Malik, Tariq (28 September 2019). "Elon Musk Unveils SpaceX's New Starship Plans for Private Trips to the Moon, Mars and Beyond". Space.com. Retrieved 29 September 2019.
- Zafar, Ramish (28 September 2019). "SpaceX's Starship Mk1 Expected To Be Ready For 20km Test In 2 Months". wccftech.com. Retrieved 29 September 2019.
- "Making Life Multiplanetary: Abridged transcript of Elon Musk's presentation to the 68th International Astronautical Congress in Adelaide, Australia" (PDF). SpaceX. September 2017.
- "Orbital refilling is critical for high payload to moon or Mars. Initially just Starship to Starship, later dedicated tankers.", Elon Musk, Twitter, 21 July 2019, accessed 22 July 2019.
- Gaynor, Phillip (9 August 2018). "The Evolution of the Big Falcon Rocket". NASASpaceFlight.com. Retrieved 30 March 2019.
- Jeff Foust (15 October 2017). "Musk offers more technical details on BFR system". SpaceNews. Retrieved 15 October 2017.
[Musk wrote,] "The flight engine design is much lighter and tighter, and is extremely focused on reliability."
- Ralph, Eric (24 December 2018). "SpaceX CEO Elon Musk: Starship prototype to have 3 Raptors and "mirror finish"". Teslarati. Retrieved 24 December 2018.
- Could do it, but we developed low cost reusable tiles that are much lighter than transpiration cooling & quite robust, Elon Musk, 24 September 2019, accessed 24 September 2019.
- Thin tiles on windward side of ship & nothing on leeward or anywhere on booster looks like lightest option, Elon Musk, 24 July 2019, accessed 25 July 2019.
- Gebhardt, Chris (3 April 2019). "Starhopper conducts Raptor Static Fire test". NASASpaceFlight.com. Retrieved 4 April 2019.
- SpaceX Starship Will "Bleed Water" From Tiny Holes, Says Elon Musk. Kristin Houser, Futurism. 22 January 2019.
- SpaceX CEO Elon Musk explains Starship's "transpiring" steel heat shield in Q&A. Eric Ralph, Teslarati News. 23 January 2019.
- Ralph, Eric. "SpaceX tests ceramic Starship heat shield tiles on Starhopper's final flight test". Teslarati. Retrieved 8 September 2019.
- Ralph, Eric (1 April 2019). "SpaceX CEO Elon Musk proposes Starship, Starlink tech for Solar System tour". Teslarati. Retrieved 3 April 2019.
- First Private Passenger on Lunar BFR Mission. Press conference streamed live at YouTube by SpaceX. 17 September 2018.
- Elon Musk wants to move fast with SpaceX’s Starship. Stephen Clarke, Space Flight Now. 29 September 2019.
- SpaceX's Big Starship Reveal Raised More Questions Than Answers. Jonathan O'Callaghan, Forbes. 30 September 2019.
- Elon Musk Unveils His Starship, Plans to Fly It in a Matter of Months. Joel Hruska, Extreme Tech. 30 September 2019.
- The biggest lingering questions about SpaceX's Mars colonization plans. Loren Grush, The Verge. 28 September 2016. Quote: "The radiation thing is often brought up, but I think it's not too big of a deal."
- The first Mars settlers may get blasted with radiation levels 8 times higher than government limits allow. Skye Gould and Dave Mosher, Business Insider. Quote: "Ambient radiation damage is not significant for our transit times" -Elon Musk.
- SpaceX’s Elon Musk explains how his big rocket's short hops will lead to giant leaps. Alan Boyle, Geek Wire. 14 October 2019. Quote: "Ambient radiation damage is not significant for our transit times," Musk replied. "Just need a solar storm shelter, which is a small part of the ship."
- SpaceX is quietly planning Mars-landing missions with the help of NASA and other spaceflight experts. It's about time. Dave Mosher, Business Insider. 11 August 2018. Quote: "Keeping the human body healthy in space is another challenge that Porterfield said SpaceX needs to figure out."
- Elon Musk's future Starship updates could use more details on human health and survival. Loren Grush, The Verge. 4 October 2019,
- Elon Musk Still Isn't Answering The Most Important Questions About Mars. Rae Paoletta, The Inverse. 29 September 2017.
- What SpaceX Needs to Accomplish Before Colonizing Mars. Neel V. Patel, The Inverse. 30 June 2016. Quote: "Space radiation is perhaps the biggest issue at play, and it's not quite clear if Musk has a good understanding of how it works and the extent to which it's stopping us from sending astronauts to far off worlds. […] For Musk and his colleagues to move forward and simply disregard the problem posed by cosmic rays would be insanely irresponsible."
- Elon Musk's Starship may be more moral catastrophe than bold step in space exploration. Samantha Rolfe, University Of Hertfordshire, The Conversation. 2 October 2019. Quote: "I'm not sure that it is fair or ethical to expect astronauts to be exposed to dangerous levels of radiation that could leave them with considerable health problems—or worse, imminent death."
- Elon Musk Should Read This Study About Space Radiation — or Fail Miserably. Rae Paoletta, The Verge. 16 March 2018.
- Musk Reads: Elon Musk hints at first Starship payload. Mike Brown, The Inverse. 8 October 2019.
- SpaceX considering SSTO Starship launches from Pad 39A, Michael Baylor, NASASpaceFlight.com, 17 May 2019, accessed 18 May 2019.
- Burghardt, Thomas (25 July 2019). "Starhopper successfully conducts debut Boca Chica Hop". NASASpaceFlight.com. Retrieved 26 July 2019.
- Elon Musk [@elonmusk] (22 May 2019). "Mk1 & Mk2 ships at Boca & Cape will fly with at least 3 engines, maybe all 6" (Tweet) – via Twitter.
- Murphy, Mike (10 January 2019). "Elon Musk shows off SpaceX's massive Starship test rocket". MarketWatch. Retrieved 3 June 2019.
- Berger, Eric (8 January 2019). "Here's why Elon Musk is tweeting constantly about a stainless-steel starship". Ars Technica. Retrieved 12 January 2019.
- Commercial Space Transportation Experimental Permit -- Experimental Permit Number: EP19-012, FAA, 21 June 2019, accessed 29 June 2019.
- Ralph, Eric (12 March 2019). "SpaceX begins static Starhopper tests as Raptor engine arrives on schedule". Teslarati. Retrieved 22 March 2019.
- Gebhardt, Chris (18 March 2019). "Starhopper first flight as early as this week; Starship/Superheavy updates". NASASpaceFlight.com. Retrieved 22 March 2019.
- Baylor, Michael (2 June 2019). "SpaceX readying Starhopper for hops in Texas as Pad 39A plans materialize in Florida". NASASpaceFlight.com. Retrieved 3 June 2019.
- Ralph, Eric (9 March 2019). "SpaceX's Starship prototype moved to launch pad on new rocket transporter". Teslarati. Retrieved 22 March 2019.
- Baylor, Michael (27 August 2019). "SpaceX's Starhopper completes 150 meter test hop". NASASpaceFlight. Retrieved 27 August 2019.
- Jeff Foust (15 October 2017). "Musk offers more technical details on BFR system". SpaceNews. Retrieved 15 October 2017.
[The] spaceship portion of the BFR, which would transport people on point-to-point suborbital flights or on missions to the moon or Mars, will be tested on Earth first in a series of short hops. ... a full-scale Ship doing short hops of a few hundred kilometers altitude and lateral distance ... fairly easy on the vehicle, as no heat shield is needed, we can have a large amount of reserve propellant and don't need the high area ratio, deep space Raptor engines.
- Foust, Jeff (12 March 2018). "Musk reiterates plans for testing BFR". SpaceNews. Retrieved 15 March 2018.
Construction of the first prototype spaceship is in progress. 'We're actually building that ship right now,' he said. 'I think we'll probably be able to do short flights, short sort of up-and-down flights, probably sometime in the first half of next year.'
- "SpaceX's Starship hopper steps towards first hop with several cautious tests". Teslarati. 29 March 2019. Retrieved 31 March 2019.
- Foust, Jeff (24 December 2018). "Musk teases new details about redesigned next-generation launch system". SpaceNews. Retrieved 25 December 2018.
- Grush, Loren (3 April 2019). "SpaceX just fired up the engine on its test Starship vehicle for the first time". The Verge. Retrieved 4 April 2019.
- Bergin, Chris [@NASASpaceflight] (5 April 2019). "StarHopper enjoys second Raptor Static Fire!" (Tweet). Retrieved 23 May 2019 – via Twitter.
- "Commercial Space Transportation Experimental Permit, No. EP19-012" (PDF). Office of Commercial Space Transportation, Federal Aviation Administration. 21 June 2019. Retrieved 11 July 2019.
- "FAA | Commercial Space Data | Permitted Launches". Federal Aviation Administration. Retrieved 7 August 2019.
- Elon Musk [@elonmusk] (22 December 2018). "We're building subsections of the Starship Mk I orbital design there [in San Pedro]" (Tweet) – via Twitter.
- Elon Musk [@elonmusk] (10 January 2019). "Should be done with first orbital prototype around June" (Tweet) – via Twitter.
- Kanter, Jake (11 January 2019). "Elon Musk released a photo of his latest rocket, and it already delivers on his promise of looking like liquid silver". Business Insider. Retrieved 13 January 2019.
- Ralph, Eric (26 March 2019). "SpaceX's steel Starship glows during Earth reentry in first high-quality render". Teslarati. Retrieved 28 March 2019.
- 'Totally Nuts'? Elon Musk Aims to Put a Starship in Orbit in 6 Months. Here's SpaceX's Plan. Mike Wall, Space.com. 30 September 2019.
- https://www.cnbc.com/2019/10/17/spacex-starts-construction-of-another-starship-rocket-in-florida.html, CNBC, 17 October 2019, accessed 18 October 2019.
- @elonmusk (22 September 2019). "Mk1 ship is around 200 tons dry & 1400 tons wet, but aiming for 120 by Mk4 or Mk5. Total stack mass with max payload is 5000 tons" (Tweet) – via Twitter.
- Elon Musk [@elonmusk] (22 September 2019). "For aero control, it comes down to % of cross-sectional area moving vs not. Flexible as to whether front or rear, so long as within bounds of center of mass & pressure" (Tweet) – via Twitter.
- Elon Musk [@elonmusk] (22 September 2019). "Nose tip has forward movable fins, cold gas attitude control thrusters, header tanks for landing, composite pressure vessels, several large batteries, etc. Placed up there to balance high mass of Raptors & rear fins at the bottom" (Tweet) – via Twitter.
- Elon Musk [@elonmusk] (22 September 2019). "Stability is controlled by (very) rapid movement of rear & fwd fins during entry & landing, as well as ACS thrusters. The smaller leeward "fin" would simply be used as a leg" (Tweet) – via Twitter.
- Elon Musk [@elonmusk] (24 September 2019). "Many powerful electric motors & batteries. Force required is enormous, as entire fin moves. More about this on the 28th" (Tweet) – via Twitter.
- A conversation with Elon Musk about Starship, The Everyday Astronaut, 1 October 2019.
- Burghardt, Thomas (16 July 2019). "Starhopper fires up for an eventful Static Fire test". NASASpaceFlight.com. Retrieved 17 July 2019.
- Berger, Eric (26 July 2019). "SpaceX's Starship prototype has taken flight for the first time". Ars Technica. Retrieved 26 July 2019.
- Ralph, Eric (27 August 2019). "SpaceX scrubs Starhopper's final Raptor-powered flight as Elon Musk talks 'finicky' igniters". Teslarati. Retrieved 27 August 2019.
- Ralph, Eric (13 August 2019). "SpaceX settles on Friday for Starhopper's next flight test milestone, FAA permitting". Teslarati. Retrieved 27 August 2019.
- 150 Meter Starhopper Test. SpaceX. 27 August 2019. Retrieved 27 August 2019 – via YouTube.
- Mosher, Dave (7 August 2019). "SpaceX may 'cannibalize' its first Mars rocket-ship prototype in Elon Musk's race to launch Starship". Business Insider. Retrieved 27 August 2019.
- Elon Musk [@elonmusk] (28 August 2019). "Aiming for 20km flight in Oct & orbit attempt shortly thereafter. Starship update will be on Sept 28th, anniversary of SpaceX reaching orbit. Starship Mk1 will be fully assembled by that time" (Tweet). Retrieved 29 August 2019 – via Twitter.
- Smith, Rich (8 December 2018). "A Renamed BFR Could Be Key to SpaceX's Satellite Internet Dream". The Motley Fool. Retrieved 6 April 2019.
- Elon Musk [@elonmusk] (12 May 2018). "SpaceX will prob build 30 to 40 rocket cores for ~300 missions over 5 years. Then BFR takes over & Falcon retires. Goal of BFR is to enable anyone to move to moon, Mars & eventually outer planets" (Tweet) – via Twitter.
- Sheetz, Michael (18 March 2019). "Super fast travel using outer space could be $20 billion market, disrupting airlines, UBS predicts". CNBC. Retrieved 30 March 2019.
- Elon Musk (28 September 2017). Starship | Earth to Earth (video). SpaceX. Event occurs at 1:45. Retrieved 30 March 2019 – via YouTube.
- Neil Strauss (15 November 2017). "Elon Musk: The Architect of Tomorrow". Rolling Stone. Retrieved 30 March 2019.
- Ralph, Eric (30 May 2019). "SpaceX CEO Elon Musk wants to use Starships as Earth-to-Earth transports". Teslarati. Retrieved 31 May 2019.