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The International Space Station (ISS) is a space station in low Earth orbit (LEO). It is the product of the International Space Station program and is...

Starlink is a satellite internet constellation operated by Starlink Services, LLC, an international telecommunications provider that is a wholly owned...

A satellite or an artificial satellite is an object, typically a spacecraft, placed into orbit around a celestial body. They have a variety of uses, including...

The Artemis program is a Moon exploration program led by the United States' National Aeronautics and Space Administration (NASA), aimed at returning humans...

A quasar (/ˈkweɪzɑːr/ KWAY-zar) is an extremely luminous active galactic nucleus (AGN). It is sometimes known as a quasi-stellar object, abbreviated QSO...

New Horizons is an interplanetary space probe launched as a part of NASA's New Frontiers program. It was launched in 2006, becoming the first spacecraft...

A supermassive black hole (SMBH or sometimes SBH) is the largest type of black hole, with its mass being on the order of hundreds of thousands, or millions...

The State Corporation for Space Activities "Roscosmos", commonly known simply as Roscosmos (Роскосмос), is a state corporation of the Russian Federation...

Apollo–Soyuz was the first crewed international space mission, conducted jointly by the United States and the Soviet Union in July 1975. Millions watched...

Space debris (also known as space junk, space pollution, space waste, space trash, space garbage, or cosmic debris) are defunct human-made objects in space –...

Europa Clipper (previously known as the Europa Multiple Flyby Mission) is a mission to send a space probe developed by NASA to study Europa, a Galilean...

The following is a list of minor planets in ascending numerical order. Minor planets are small bodies in the Solar System: asteroids, distant objects,...

Human spaceflight (also referred to as crewed spaceflight, and historically as manned spaceflight) is spaceflight with a crew or passengers aboard a spacecraft...

Haumea (minor-planet number 136108) is a dwarf planet located beyond Neptune's orbit. It was discovered in 2004 by a team headed by Mike Brown of Caltech...

The China Space Station (CSS) (Chinese: 中国空间站; pinyin: Zhōngguó kōngjiānzhàn), also known as Tiangong (Chinese: 天宫; pinyin: Tiāngōng; lit. 'Heavenly Palace')...

The possibility of life on Mars is a subject of interest in astrobiology due to the planet's proximity and similarities to Earth. To date, no conclusive...

A CubeSat is a class of small satellite with a form factor of 10 cm (3.9 in) cubes. CubeSats have a mass of no more than 2 kg (4.4 lb) per unit, and often...

Juno is a NASA space probe orbiting the planet Jupiter. Built by Lockheed Martin and operated by NASA's Jet Propulsion Laboratory, the spacecraft was launched...

The Jupiter trojans, commonly called trojan asteroids or simply trojans, are a large group of asteroids that share the planet Jupiter's orbit around the...

The Boeing X-37, also known as the Orbital Test Vehicle (OTV), is a reusable robotic spacecraft. It is boosted into space by a launch vehicle, re-enters...