The Earth’s Lagrange points are vital for the future of astronomy, possibly space exploration and some even say preventing a climate disaster. So what are they, how do they differ from each other, and how can they be used? The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

Newton’s most famous insight involved the fact that the same force that could make an apple fall to Earth could also keep the Moon in the sky, so long as it was moving fast enough. Under most circumstances, orbital speed is the only way to stop something in space from suffering the apple’s fate.

However, once you allow for the fact that the Earth’s gravity interacts with the Sun’s, it turns out there are places where stillness doesn’t mean crashing to Earth shortly a

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