most recent 30 from http://asksci.com 2010-07-29T19:25:00Z http://asksci.com/feeds/question/66 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://asksci.com/questions/66/atoms-in-the-observable-universe Jonathan Sampson 2009-10-19T18:24:27Z 2010-02-23T04:23:30Z

<p>It is estimated that there are 10⁸⁰ atoms in the observable Universe. What methods exist to reach this number, and with what degree of accuracy should they be treated?</p>

http://asksci.com/questions/66/atoms-in-the-observable-universe/67#67 ripper234 2009-10-19T21:32:21Z 2009-10-19T21:32:21Z

<p>See this <a href="http://en.wikipedia.org/wiki/Observable%5Funiverse#Matter%5Fcontent" rel="nofollow">wikipedia entry</a>.</p>