.comment-link {margin-left:.6em;}


Wednesday, February 01, 2006

Man, the universe is pretty, um, big

From The Atlas of the Universe:
* Number of superclusters in the visible universe = 10 million
* Number of galaxy groups in the visible universe = 25 billion
* Number of large galaxies in the visible universe = 350 billion
* Number of dwarf galaxies in the visible universe = 3.5 trillion
* Number of stars in the visible universe = 30 billion trillion (30,000,000,000,000,000,000,000)

So if intelligent life exists around one in a trillion stars (0.0000000001 percent of stars), then there are 30 billion planets with intelligent life in the universe. Is one in a trillion still overestimating the likelihood of intelligent life?

By the way, check out that site -- the map of the large scale structure of the universe is worth the price of admission.


  • Great site David - thanks.

    By Anonymous ruth, at 1:10 AM  

  • Thanks Ruth. Always happy to turn someone on to something I find interesting...

    By Blogger David, at 3:03 PM  

Post a Comment

Links to this post:

Create a Link

<< Home