I always wonder this, I wish we found proof that we were right though. :/
---------- Post added at 11:39 AM ---------- Previous post was at 11:37 AM ----------
Originally posted by spo0n
Of course it is!. It would be terribly foolish to think we are the only life form in the Universe, even if only 1% of all the stars in the Universe have a similar 'Earth-like-planet' that still leaves billions upon billions of Planets.
Just check out "Gliese 581g"
This is the paragraph I found about "Gliese 581g" on Wikipedia. Just thought I'd post it here instead of you having to look it up.
Gliese 581 g (pronounced /ˈɡliːzə/), also Gl 581 g or GJ 581 g, is an unconfirmed extrasolar planet, orbiting the red dwarf star Gliese 581, 20.5 light-years (1.94×1014 km) from Earth in the constellation of Libra. It is the sixth planet discovered in the Gliese 581 planetary system and the fourth in order of increasing distance from the star. The discovery was announced by the Lick-Carnegie Exoplanet Survey in late September 2010, after a decade of observation.
Studies indicate the planet is situated near the middle of the habitable zone of its parent star, where temperatures are neither too hot nor too cold. If it is a rocky planet, favorable atmospheric conditions could permit the presence of liquid water, a necessity for all known life, on its surface. With a mass 3.1 to 4.3 times Earth's, Gliese 581 g is considered a super-Earth, and is the planet closest in size to Earth known in a habitable zone. This makes it the most Earth-like Goldilocks planet found outside the Solar System and the exoplanet with the greatest recognized potential for harboring life.
The detection of Gliese 581 g after such a short period of searching and at such close proximity leads astronomers to believe the proportion of stars with habitable planets may be greater than ten percent.