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Alpha Centauri (α Centauri, α Cen, or Alpha Cen) is a triple star system in the southern constellation of Centaurus. It consists of three stars: Rigil...

New Horizons is an interplanetary space probe launched as a part of NASA's New Frontiers program. Engineered by the Johns Hopkins University Applied Physics...

Chandrayaan-1 (pronunciation; from Sanskrit: Chandra, "Moon" and yāna, "craft, vehicle") was the first Indian lunar probe under the Chandrayaan programme...

In astronomy, the term compact object (or compact star) refers collectively to white dwarfs, neutron stars, and black holes. It could also include exotic...

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...

The following tables list all minor planets and comets that have been visited by robotic spacecraft. A total of 18 minor planets (asteroids, dwarf planets...

64 Draconis is a single star in the northern circumpolar constellation of Draco, located 452 light years away. It has the Bayer designation of e Draconis;...

δ Doradus (often Latinised to Delta Doradus, abbreviated to δ Dor or delta Dor) is a star in the southern constellation of Dorado. Based upon an annual...

A thermal rocket is a rocket engine that uses a propellant that is externally heated before being passed through a nozzle to produce thrust, as opposed...

The March 1989 geomagnetic storm occurred as part of severe to extreme solar storms during early to mid March 1989, the most notable being a geomagnetic...

The Scientific Workgroup for Rocketry and Spaceflight (WARR) (German: Wissenschaftliche Arbeitsgemeinschaft für Raketentechnik und Raumfahrt) is a scientific...

The Valkyrie is a theoretical spacecraft designed by Charles Pellegrino and Jim Powell (a physicist at Brookhaven National Laboratory). The Valkyrie is...

John Birmingham (1816–1884) was an Irish astronomer, amateur geologist, polymath and poet. He spent six or seven years travelling widely in Europe where...

Break-in or breaking in, also known as run-in or running in, is the procedure of conditioning a new piece of equipment by giving it an initial period of...