365 Days of Astronomy - Weekly Edition
Ep. 502: No Touching: Determining Composition of Worlds Remotely
22 Oct 2018
Description
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.
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