Ep. 502: No Touching: Determining Composition of Worlds Remotely - a podcast by 365DaysOfAstronomy.org

from 2018-10-22T20:54:50

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How do you know what something is made of if you can't reach out and touch it? How do we know what planets lights years away have in their atmosphere? What about the rocks all around Curiosity? Or the geysers coming out of Europa and Enceladus? Scientists have a few handy tricks.