How many stars in the universe?

[search]

LOL<br /><br />You have to send that one to brazilian_and_proud I am sure he will love it...And check:<br />http://www.toostupidtobepresident.com/

 

[triclon]

According to http://curious.astro.cornell.edu/question.php?number=342 the mass of the observable universe is 3 x 10^55 grams. Since 9/10 of the universe is dark matter (assuming dark matter is not made up of stars) we divide that figure by 10 to get 3 x 10^54 grams for the mass of things we can see in the observable universe (which consists mainly of stars). Dividing by 1000 converts 3 x 10^54 grams to 3 x 10^51 Kilograms. Assuming the sun represents the size of the average star, we divide this figure by the sun's mass to get approximately the number of stars in the observable universe. 1.99 x 10^30 kg is the sun's mass so (3 x 10^51)/(1.99 x 10^30) = about 1.5 x 10^21 stars that can be seen in the observable universe. Hmmm I wonder how accurate that number is.<br /><br />That's around 1,500,000,000,000,000,000,000 stars folks.

 

[derekmcd]

Classic!!! <div class="Discussion_UserSignature"> <div> </div><br /><div><span style="color:#0000ff" class="Apple-style-span">"If something's hard to do, then it's not worth doing." - Homer Simpson</span></div> </div>

 

[alokmohan]

Billions of billions of billions.

 

[gsuschrist]

Round it off to the nearest trillion? you wish! We can't come to within a fraction of the nearst trillion, quadrillion, quintillion, etc.<br /><br />There are two scientifically based estimates in this thread and they have a difference of a power of 10. That indicates we don't know and it's guestimates. <br /><br /> Bazillions is every bit as accurate.