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A rocket (from Italian: rocchetto, lit. 'bobbin/spool') is a vehicle that uses jet propulsion to accelerate without using the surrounding air. A rocket...

A helium flash is a very brief thermal runaway nuclear fusion of large quantities of helium into carbon through the triple-alpha process in the core of...

In astronomy, the Hills cloud (also called the inner Oort cloud and inner cloud) is a vast theoretical circumstellar disc, interior to the Oort cloud,...

The first direct observation of gravitational waves was made on 14 September 2015 and was announced by the LIGO and Virgo collaborations on 11 February...

Orel (Russian: Орёл, lit. 'Eagle') or Oryol, formerly Federation (Russian: Федерация, romanized: Federatsiya), and PPTS (Russian: Перспективная Пилотируемая...

De revolutionibus orbium coelestium (English translation: On the Revolutions of the Heavenly Spheres) is the seminal work on the heliocentric theory of...

14P/Wolf is a periodic comet in the Solar System. Max Wolf (Heidelberg, Germany) discovered the comet on September 17, 1884 (15 days) before it passed...

Laurel Blair Clark (née Salton; March 10, 1961 – February 1, 2003) was an American NASA astronaut, medical doctor, United States Navy captain, and Space...

A gravitational-wave detector (used in a gravitational-wave observatory) is any device designed to measure tiny distortions of spacetime called gravitational...

Nuclear power in space is the use of nuclear power in outer space, typically either small fission systems or radioactive decay for electricity or heat...

Dong Fang Hong 1 (simplified Chinese: 东方红一号; traditional Chinese: 東方紅一號; pinyin: Dōngfānghóng Yīhào; lit. 'The East is Red no.1'), in the western world...

(78799) 2002 XW93, provisional designation 2002 XW93, is a trans-Neptunian object and centaur from the outer Solar System, approximately 500–600 kilometers...

Douglas Bennett Shane is President of The Spaceship Company, as well as an American test pilot who has trained as a commercial astronaut. He was a member...

The Israeli Nano Satellite Association was set up in Israel in 2006, with the aim of promoting the use of nanosatellites (very small artificial satellites)...

(6178) 1986 DA is a metallic asteroid, classified as near-Earth object of the Amor group, approximately 3 kilometers in diameter. It was discovered on...

4183 Cuno, provisional designation 1959 LM, is an eccentric, rare-type asteroid, classified as near-Earth object and potentially hazardous asteroid of...

Doug Rich (born 1948, in Hartford, Connecticut) is an American amateur astronomer, supernova discoverer, and team leader for the Eagle Hill Supernova Search...