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Mir (Russian: Мир, IPA: [ˈmʲir]; lit. 'peace' or 'world') was a space station that operated in low Earth orbit from 1986 to 2001, operated by the Soviet...

Space colonization is the use of outer space for colonization, such as permanent habitation, exploitation or territorial claims. Extraterrestrial colonization is...

The expansion of the universe is the increase in distance between gravitationally unbound parts of the observable universe with time. It is an intrinsic...

This is a list of astronauts by year of selection: people selected to train for a human spaceflight program to command, pilot, or serve as a crew member...

In astronomy, the new moon is the first lunar phase, when the Moon and Sun have the same ecliptic longitude. At this phase, the lunar disk is not visible...

Asteroid mining is the hypothetical extraction of materials from asteroids and other minor planets, including near-Earth objects. Notable asteroid mining...

Spacecraft propulsion is any method used to accelerate spacecraft and artificial satellites. In-space propulsion exclusively deals with propulsion systems...

Private spaceflight refers to spaceflight activities undertaken by non-governmental entities, such as corporations, individuals, or non-profit organizations...

The Hill sphere is a common model for the calculation of a gravitational sphere of influence. It is the most commonly used model to calculate the spatial...

Flight controllers are personnel who aid space flight by working in such Mission Control Centers as NASA's Mission Control Center or ESA's European Space...

Jonathan Robert Dory is a Human Systems Integration Lead at NASA's Johnson Space Center (JSC) in Houston, Texas. He is Branch Chief of NASA's Habitability...

Cis-Lunar was a company specializing in the production of automatic, computer-controlled, and closed-circuit rebreathers for astronauts and underwater...

Solar eclipses on the Moon are caused when the planet Earth passes in front of the Sun and blocks its light. Viewers on Earth experience a lunar eclipse...

A space rendezvous (/ˈrɒndeɪvuː/) is a set of orbital maneuvers during which two spacecraft, one of which is often a space station, arrive at the same...

Airbus Defence and Space is a division of Airbus SE. It is responsible for the development and manufacturing of defence and space products, and providing...

A geostationary transfer orbit (GTO) or geosynchronous transfer orbit is a type of geocentric orbit. Satellites that are destined for geosynchronous (GSO)...

In physical cosmology, the shape of the universe refers to both its local and global geometry. Local geometry is defined primarily by its curvature, while...

The SAO/NASA Astrophysics Data System (ADS) is an online database of over 15 million records of publications developed by the National Aeronautics and...

NGC 262 (also known as Markarian 348) is a spiral galaxy in the cluster LGG 14. It is a Seyfert 2 spiral galaxy located 287 million light years away in...

The Hercules–Corona Borealis Great Wall (HCB) or simply the Great Wall is a galaxy filament that is the largest known structure in the observable universe...