## There is Intelligent Life *Out There*

Here are two images from the Hubble Deep Field Project.

According the the press release, the images each represent a region of the sky
of a size which would
be blocked out by a 1cm circle at a distance of about 25 meters (they
actually say a U.S. dime at a distance of about 75 feet).
Multiply the hundreds of galaxies in this tiny portion of the sky by the
size of the entire sky and the result is a vast number of
galaxies.

Specifically,
if we assume that there are 300 galaxies in the first picture, then the math works
out to 300 times the area of a sphere with a radius of 25 meters (i.e. 2500
centimeters)
divided by the area of a circle with a radius of 0.5 centimeters.
Assuming that there are 300 galaxies in the first picture and
keeping in mind that the area of a sphere is given by the formula
and the area of a circle is given by the formula
, the number of galaxies in the sky is
given by the formula
or about 30,000,000,000 galaxies in the sky
(MINSE was used to
render these formulas).

Frankly, I have trouble believing that Earth is the only planet in all of
these galaxies with intelligent life on it (assuming that there is
intelligent life on Earth!).

The alternative (i.e. that we are *alone*) has always struck me as:

- highly improbable
- conceited
- very lonely

-Daniel Boulet (danny@obtuse.com)

Click on each image to get a much larger version.

Daniel Boulet

http://www.bouletfermat.com/danny/life_out_there.html