A long, long time ago (roughly 4.5 billion years ago, actually), in a galaxy not so far away (our Milky Way) the Earth was a boiling ocean of hot magma, spinning in space, minding its own business. Not long after that, (about 30 million years later, which, in the lifetime of the universe, isnt very long at all) a big bully of an asteroid about the size of Mars struck the magma-ocean Earth a glancing blow. This blow knocked the hot rock out of the proto-planet, broke the asteroid into pieces and also splashed a huge glob of the magma ocean out into space. Eventually, the two magma globs cooled to form the Earth and the Moon. Or, maybe the boiling magma ocean began spinning too fast and eventually broke apart to form two separate celestial bodies: the Earth and the Moon. Or perhaps, after the Earth was formed, she caught the eye of a large passing asteroid and pulled him onto the galactic dance floor. Why, hello there, Moon. I havent seen you round these parts before. Care to dance?
Posted on: Thu, 23 Jan 2014 09:21:48 +0000
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