We have confirmed the existence of 709 planets outside of our solar system.
So far, none of them are known to be "Earth-like" in any meaningful way. We simply don't know enough about any of them to make that determination. That is also true of Kepler 22-b and the planets in the Gliese 581 system, despite what others have claimed.
So far, none of them are known to be "Earth-like" in any meaningful way. We simply don't know enough about any of them to make that determination. That is also true of Kepler 22-b and the planets in the Gliese 581 system, despite what others have claimed.
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Can't give you an exact but I believe only a small number of planets have been discovered but the number of solar systems containing planets is believed to number in the millions to billions in our galaxy alone. Of these, about 2/3 are Earth like and this represents an insignificantly small percentage. Keep in mind this is just discovered earth like planets.
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2326 candidates + 709 confirmed = 3035 exoplanets
http://planetquest.jpl.nasa.gov/
I think there are 2 earthlike planets: Kepler-22b and Gliese 581g
http://planetquest.jpl.nasa.gov/
I think there are 2 earthlike planets: Kepler-22b and Gliese 581g