November 15, 2012
Did a Lost Star Tweak Earth's Orbit?
Ken Croswell, Science Now
One young star may yank another's developing solar system, a new theory suggests, accounting for planets that circle their stars on tilted paths. This idea may also explain a long-standing puzzle close to home: why Earth's orbit is tipped 7° relative to the sun's equator.
TAGGED: Earth's Orbit, Planets, Stars