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A lunar eclipse is an astronomical event that occurs when the Moon moves into the Earth's shadow, causing the Moon to be darkened. Such an alignment occurs...

Uncrewed spacecraft or robotic spacecraft are spacecraft without people on board. Uncrewed spacecraft may have varying levels of autonomy from human input...

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

Lunar theory attempts to account for the motions of the Moon. There are many small variations (or perturbations) in the Moon's motion, and many attempts...

Albategnius is an ancient lunar impact crater located in the central highlands. It is named after the Mesopotamian Muslim astronomer and scientist Abū...

Neith is a hypothetical natural satellite of Venus reportedly sighted by Giovanni Cassini in 1672 and by several other astronomers in following years....

WR 101-2, also known as CXOGC J174516.1-284909, is a Wolf-Rayet star located in the Galactic Center, about 8,000 pc away from Earth. Its size has been...

The Space Generation Advisory Council (SGAC), in support of the United Nations Programme on Space Applications, is a non-governmental organization and...

The W series was a family of geosynchronous satellites operated by Eutelsat which provided various coverage and bandwidth options for consumer and business...

Integral field spectrographs (IFS) combine spectrographic and imaging capabilities in the optical or infrared wavelength domains (0.32 μm – 24 μm) to get...

Studied in 1968 by Marshall Space Flight Center, the Saturn V-B was considered an interesting vehicle concept because it nearly represents a single-stage...

David Todd Wilkinson (May 13, 1935 – September 5, 2002) was an American cosmologist, specializing in the study of the cosmic microwave background radiation...

The Society for Popular Astronomy (SPA) is a national astronomical society based in the United Kingdom for beginners to amateur astronomy. It was founded...

The earth is constantly monitored by several satellites operating in the earth exploration-satellite service (EESS) or space research service (SRS). These...

In mathematics and particularly in topology, pairwise Stone space is a bitopological space ( X , τ 1 , τ 2 ) {\displaystyle \scriptstyle (X,\tau _{1},\tau...

Pioneer Rocketplane was an aerospace design and development company intent on developing affordable crewed space flight. The company is most famous for...