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A rocket engine uses stored rocket propellants as the reaction mass for forming a high-speed propulsive jet of fluid, usually high-temperature gas. Rocket...

Bigelow Aerospace was an American space design and manufacturing company which closed its doors in 2020. It was an aeronautics and outer space technology...

Comet West, formally designated C/1975 V1, 1976 VI, and 1975n, was a comet described as one of the brightest objects to pass through the inner Solar System...

The geology of Venus is the scientific study of the surface, crust, and interior of the planet Venus. Within the Solar System, it is the one nearest to...

Kliper (Клипер, English: Clipper) was an early-2000s proposed partially-reusable (excluding orbital section and thermal protection shield) crewed spacecraft...

In astronomy and cosmology, the dark fluid theory attempt to explain dark matter and dark energy in a single framework, as suggested by cosmologist Alexandre...

An astronomical radio source is an object in outer space that emits strong radio waves. Radio emission comes from a wide variety of sources. Such objects...

Liquid Fly-back Booster (LFBB) was a German Aerospace Center's (DLR's) project concept to develop a liquid rocket booster capable of reuse for Ariane 1...

HD 150248 is a Sun-like star 87 light-years (26.6 parsecs) from the Sun. HD 150248 is a G-type star and a near solar twin. HD 150248's photometric color...

The Baikal booster (Russian: Байкал) was a proposed reusable flyback booster for the Angara rocket family based on the Angara Universal Rocket Module in...

Earth orbit rendezvous (EOR) is a method for conducting round trip human flights to the Moon, involving the use of space rendezvous to assemble, and possibly...

Wiesław Z. Wiśniewski (May 2, 1931 in Poland – February 28, 1994 in Tucson, Arizona, United States) was a Polish astronomer. Wisniewski was born and educated...

Thomas Boles (born 1944 in Lennoxtown in Scotland) is a Scottish amateur astronomer, discoverer of astronomical objects, author, broadcaster and former...

Beta Sagittarii (β Sagittarii, abbreviated Beta Sgr, β Sgr) is the common designation shared by two star systems in the constellation of Sagittarius, themselves...

(386454) 2008 XM is a highly eccentric, sub-kilometer-sized asteroid, with one of the smallest known perihelions among all minor planets. It is classified...

Blastoff! Corporation was a small aerospace company in Pasadena, California, that operated from 1999 to early 2001 as one of dozens of Idealab's incubator...

The DH-1 was a circa-2005 reusable two-stage-to-orbit rocket concept proposed in the book The Rocket Company by Patrick J. G. Stiennon, David M. Hoerr...

Gunaras Imantas Kakaras (born 8 January 1939, Padaičiai near Biržai) is a Lithuanian astronomer, founder and director of Lithuanian Museum of Ethnocosmology...