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Cartestian, polar, and logarithmic scales in addition to the really nerdy stuff nobody uses. U.S. and metric units.
Earth has a “second moon.” Asteroid 2003 YN107 is looping around our planet once a year.
It entered a corkscrew orbit around the Earth about 7 years ago and it was about to leave Earth’s orbit this past summer. Oh, and there are three more asteriods in similar orbits around the Earth.
Marv
