Anonymous

None. But orbiting the billions of stars in our own galaxy, there are certainly planets with conditions close enough or better than the earth for life as we know it to evolve.

Anonymous

Too many to count.

Anonymous

We do not yet really know. And you have to be more specific about what you mean by "identical."

Anonymous

I wouldn t say identical, but we ve detected planets that are about Earth size and in the Goldilocks zone that are believed to be habitable.

Anonymous

Nobody knows.

Anonymous

billions of suns,millions of planets which we can not yet eyeball direct, nother words,we don't really know

Anonymous

Completely unknown But Absence of Proof does not mean Proof of Absence

Anonymous

Identical, none. They say no two snowflakes are identical, no people are identical, not even identical twins. Planets are very complicated and the Earth is constantly changing.