Browsing: Planetary Formation

Definition: A natural satellite is a celestial body that orbits a planet or another, more…

Discovery and Characteristics The discovery of an exomoon, orbiting an exoplanet around a star, has…

On July 16, 1994, history was made as the fragments of Comet Shoemaker-Levy 9 (SL9)…

Launch Date: August 20, 1977 A Historic Mission Voyager 2 is one of two robotic…