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originally posted in: Ask me anything about Astronomy
4/5/2016 12:45:21 PM
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Electromagnetic spectrum. Red is less energetic, blue is more. Light gets redshifted when it has to move a farther distance due to the expansion of space. I'll be honest, I only know of them detecting them due to the transit of the planet in front of the star. I guess since they are technically black bodies we may be able to detect them by their own light, but idk.
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