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Meteorite Mineralogy  

Alan E. Rubin and Chi Ma

Online publication date:
Sep 2020
Meteorites are rocks from outer space that reach the Earth; more than 60,000 have been collected. They are derived mainly from asteroids; a few hundred each are from the Moon and Mars; some ... More

The Pluto−Charon System  

Will Grundy

Online publication date:
Jul 2019
Pluto orbits the Sun at a mean distance of 39.5 AU (astronomical units; 1 AU is the mean distance between the Earth and the Sun), with an orbital period of 248 Earth years. Its orbit is ... More