Physics Van 3-site Navigational Menu

Physics Van Navigational Menu

Q & A: A Universe-Worth of Stars!

Learn more physics!

Most recent answer: 10/22/2007
Q:
how many stars are there in the universe?
- Anonymous
A:
We don't actually know exactly how many stars there are in the universe (definitely too many to count), but scientists can make some pretty good guesses. According to Laura Whitlock, a high-energy astronomer from , scientists believe that there are probably about 10^21 stars in the universe. (This is another way of writing the number 1,000,000,000,000,000,000,000!!!) To give you an idea of how many this is, say you were to try to count them all and you could count one star every second. It would take you more than 30,000,000,000,000 YEARS to count them all! This is more than 2000 times the age of the universe itself!

-Tamara

(published on 10/22/2007)

Follow-up on this answer.