orbits
Tag archives for orbits
Incredible Star Trails, from Earth and Beyond
Posted by Ethan on June 8, 2012
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“Building one space station for everyone was and is insane: we should have built a dozen.” -Larry Niven Here on the solid ground of the Earth, the Sun and Moon rise and set on a daily basis. During the hours where the Sun is invisible, blocked by the solid Earth, the stars twirl overhead in…
How old is the Sun in Galactic years?
Posted by Ethan on February 27, 2008 The Moon goes around the Earth, the Earth goes around the Sun, and the Sun goes around the center of the Milky Way. We know the Moon takes about 4 weeks to make its trip around the Earth, and that causes the Moon phases: We also know that the Earth takes one year to go…
