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|User Info||First earth-like planet purportedly discovered; entered at 2011-12-10 16:45:31|
Registered: 2008-01-24 Pasadena, CA
You can't tell anything from its distance. All you can detect is a star wobble and its relative distance from the sun. It could be Gas, scarred from impact.
In some cases you can get a diameter, if it passes in front of the star, and some radiation readings, but that leaves you with: R, mass and with a lot of assumptions, temperature. But the temperature is mostly bull**** given we don't know what the reflectivity/albedo of the atmosphere or surface is. A black body radiation model would get Mercury vs. Venus very wrong. That whole diamond planet thing a few months back was pretty hilarious.
It is very cool that we are finding lots of little planets though.