2 ms·

Here's a funky explanation with buckets of water and balls, with the astro photos to go along: http://www.youtube.com/watch?v=mRtGUCLjQ3w http://www.youtube.co

by Maro 16y ago

Here's a funky explanation with buckets of water and balls, with the astro photos to go along: http://www.youtube.com/watch?v=mRtGUCLjQ3w http://www.youtube.com/watch?v=mRtGUCLjQ3w