October 31, 2010

New estimate for the number of habitable planets in the Milky Way: 2.5 billion!

Check out this article from Bad Astronomer: How many habitable planets are there in the galaxy?
By now you may have heard the report that as many as 1/4 of all the sun-like stars in the Milky Way may have Earth-like worlds. Briefly, astronomers studied 166 stars within 80 light years of Earth, and did a survey of the planets they found orbiting them. What they found is that about 1.5% of the stars have Jupiter-mass planets, 6% have Neptune-mass ones, and about 12% have planets from 3 – 10 times the Earth’s mass.
This sample isn’t complete, and they cannot detect planets smaller than 3 times the Earth’s mass. But using some statistics, they can estimate from the trend that as many as 25% of sun-like stars have earth-mass planets orbiting them!
His conclusion: There are over 2.5 billion habitable planets in our Galaxy. Whoa, my mind just melted.

Read more.


Anonymous said...

Let's litter antz on "All" of them! And watch them grow like chea pets only with insects!

ZarPaulus said...

Particleion! I stopped following Transalchemy because it's degenerated into nothing more than an outlet for your god complex.

Though I do agree that we should colonize any planets without sapient life, assuming they still exist.