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Space colonization (also called space settlement or extraterrestrial colonization) is the use of outer space or celestial bodies other than Earth for permanent...

In physical cosmology, the age of the universe is the time elapsed since the Big Bang. Astronomers have derived two different measurements of the age of...

An Earth analog, also called an Earth analogue, Earth twin, or second Earth, is a planet or moon with environmental conditions similar to those found on...

Many astronomical phenomena viewed from the planet Mars are the same as or similar to those seen from Earth; but some (e.g. the view of Earth as an evening/morning...

Messier 4 or M4 (also known as NGC 6121 or the Spider Globular Cluster) is a globular cluster in the constellation of Scorpius. It was discovered by Philippe...

An autonomous spaceport drone ship (ASDS) is an ocean-going vessel derived from a deck barge, outfitted with station-keeping engines and a large landing...

51 Andromedae, abbreviated 51 And and formally named Nembus /ˈnɛmbəs/, is the 5th brightest star in the northern constellation of Andromeda, very slightly...

Sylvia (minor planet designation: 87 Sylvia) is one of the largest asteroids (approximately tied for 7th place, to within measurement uncertainties). It...

The 2012 National Reconnaissance Office space telescope donation to NASA was the declassification and donation to NASA of two identical space telescopes...

704 Interamnia is a large F-type asteroid. With a mean diameter of around 330 kilometres, it is the fifth-largest asteroid, after Ceres, Vesta, Pallas...

The LR87 was an American liquid-propellant rocket engine used on the first stages of Titan intercontinental ballistic missiles and launch vehicles. Composed...

Nevil Maskelyne FRS FRSE (/ˈmæskəlɪn/; 6 October 1732 – 9 February 1811) was the fifth British Astronomer Royal. He held the office from 1765 to 1811....

Aerocapture is an orbital transfer maneuver in which a spacecraft uses aerodynamic drag force from a single pass through a planetary atmosphere to decelerate...

Houssay is a lunar impact crater located on the lunar far side near the northern pole.[citation needed] The crater is located to the northeast of and directly...

Dorothy Ruíz-Martínez is a Mexican-American aerospace engineer who works for National Aeronautics and Space Administration (NASA) at the Lyndon B. Johnson...