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99942 Apophis (provisional designation 2004 MN4) is a near-Earth asteroid and a potentially hazardous object, 450 by 170 metres in size, that caused a...

A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction. A large group of stars bound by gravitation...

Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi), or 8.317 light-minutes, in a counterclockwise direction as viewed...

The effects of spaceflight on the human body are complex and largely harmful over both short and long term. Significant adverse effects of long-term weightlessness...

The Warrego Valles are a set of channels in an ancient river valley in the Thaumasia quadrangle of Mars, located at 42.2° south latitude and 93° west longitude...

1940s MX-774 (1946) "The United States Army | Redstone Arsenal Historical Information". history.redstone.army.mil. United States Army. Retrieved 8 October...

The militarisation of space involves the placement and development of weaponry and military technology in outer space. The early exploration of space in...

21 Lutetia is a large M-type asteroid in the main asteroid belt. It measures about 100 kilometers in diameter (120 km along its major axis). It was discovered...

This list of crewed Mars mission plans is a listing of concept studies for a crewed mission to Mars during the 20th and 21st centuries. It is limited to...

MagBeam is the name given to an ion propulsion system for space travel initially proposed by Professor Robert Winglee of the Earth and Space Sciences Department...

Johann Georg von Soldner (16 July 1776 in Feuchtwangen, Ansbach – 13 May 1833 in Bogenhausen, Munich) was a German physicist, mathematician and astronomer...

There once was a mission to Mars That fell with a bounce from the stars To study the mystery of life's early history Preserved in the rocks & sand bars...