events
NASA succeeds in putting the first of two Gravity Recovery and Interior Laboratory satellites in orbit around the Moon.
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NASA
American space and aeronautics agency
The National Aeronautics and Space Administration is an independent agency of the US federal government responsible for the United States's civil space program, aeronautics research and space research. Established in 1958, it succeeded the National Advisory Committee for…Source: Wikipedia (CC BY-SA)
GRAIL
NASA orbiter mission to the Moon (2011–2012)
The Gravity Recovery and Interior Laboratory (GRAIL) was an American lunar science mission in NASA's Discovery Program which used high-quality gravitational field mapping of the Moon to determine its interior structure. The two small spacecraft GRAIL A (Ebb) and GRAIL B (Flow)…Source: Wikipedia (CC BY-SA)
Satellite
Objects intentionally placed into orbit
A satellite or an artificial satellite is an object, typically a spacecraft, placed into orbit around a celestial body. They have a variety of uses, including communication relay, weather forecasting, navigation (GPS), broadcasting, scientific research, and Earth observation.…Source: Wikipedia (CC BY-SA)
Moon
Natural satellite orbiting Earth
The Moon is Earth's only natural satellite. It orbits around Earth at an average distance of 384,399 kilometres (238,854 mi); about 30 times Earth's diameter. Its orbital period and its rotation period are synchronized at 29.5 days by Earth's gravity pulling on the Moon. This…Source: Wikipedia (CC BY-SA)