Quote:
Originally Posted by NETbilling
How do they actually find, analyze and photograph a planet 500 light years away?
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PBS had a great show on this topic just a few weeks ago.
Basically they watch a star and monitor how long it takes a planet to orbit it. The faster/slower the orbit the closer/further away. The closer to the sun the hotter and the further away the colder. This one orbits it sun at just the right speed to be an Earth like planet.