Scientists Weighed the Earth Using Ghostly Particles From Space

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Scientists have to use some roundabout methods to weigh the Earth and measure what’s inside it—typically, they’ve used sound waves and the strength of gravity to make their calculations. But one team has weighed the Earth in a whole new way: by measuring mysterious cosmic particles that pass through it.

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https://gizmodo.com/scientists-weighed-the-earth-using-ghostly-particles-fr-1830233916