The odds of there being another planet able to support life as well as earth are just as improbably as there being a God....
Really? Do you know how many planets there are in the universe?
Astronomers estimate there are 1021 stars in the universe. With a conservative estimate of
three planets per star (some could have many more, some would have none at all) this puts the estimated number of planets into millions of billions. The actual number of planets in the universe is difficult to ascertain. However we do know that the number is very very large. Think about it this way, as many grains of sand there are on earth cubed still wouldn't equal the correct number.
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Our galaxy contains approximately 70 sextillion stars, though most lack planets. Current estimates say there are around 210 sextillion planets in the galaxy. There are about 100 billion galaxies in the observable universe. There are surely many galaxies outside the part of the universe we can observe and each contains a variable number of stars and average planets per star. Thus, currently we can say little more then 'probably more then 10 trillion'; that is, we can only guess at a lower limit.
When it comes to known planets in our galaxy, however, around 200 are known to exist.