SUMMARY: NASA Astronomer Martin Lo has worked out what he believes is a series of low energy flight paths that spacecraft can take to minimize they fuel they need to move around our solar system. Each planet and moon have five points near them where gravity balances out, called Lagrange points - by networking them together, Lo has worked out paths which will use very little fuel to travel from planet to planet. The first spacecraft to take advantage his work will be NASA's Genesis mission, which will collect solar particles and then return them back to Earth.

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