"elrond" wrote:
This is a pretty neat idea. Do you think there is any correlation between
possible planets orbiting a star and the radiation it gives off?

Very slight. If the planet is heavy enough and in close enough orbit
around the star, you can detect the Doppler shift due to the motion that the
planet causes in the star (they orbit the center of mass for the whole system,
but the star's motion is very slight due to its much greater mass, so
detecting this is a challenge). If the planet passes in front of the star, it
will block a small fraction of the radiation reaching us (this has been
detected once in an extrasolar planet). Theoretically, we should be able to
detect radiation reflected from or actually emitted by (infrared is the best
candidate for the latter) the planet; someone claimed to have achieved such a
detection of a planet that had already been detected by some other means, but
I don't know if this has been confirmed.

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