This question is brought up due to confusion over that cool video of an asteroid cricling the Earth and not understanding the explanation of what the L1 represents. Thank you.
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If you have a two body system, like the Sun and the Earth, most orbital points are unstable. This means if you put something there and you don’t use rockets to keep it there it will fall into the Sun or the Earth in a few years. There are 5 points where this doesn’t happen, the Legrange points.
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