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How many stars are their in the universe?

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In the observable universe there are about 80 to 100 billion galaxies with varying numbers of stars in each. A rough mean average for the number of stars per galaxy is 400 billion. It is thought that there are from 30 to 70 billion trillion (i.e. 30 to 70 sextillion) stars in the observable universe. Whilst the estimates differ somewhat, the number of stars seems to be in the sextillions, which is a 1 followed by 21 zeros.

There are many reasons why our estimates vary as much as they do. An important point to consider is that when we observe distant objects such as stars, we don't see them as they are now, but as they were in the past. The reason we see into the past as we look out into the universe is because the light we see takes a finite amount of time to reach us. As such, some of the stars we see, particularly those in very distant regions of space (relative to earth), may no longer be counted as stars. Conversely, new stars in distant regions may have already formed but we wouldn't see them until light from those stars reaches us here on earth.
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How many stars are in the universe?

Based on current estimates, there are between 200 - 400 billion stars in our galaxy (The Milky Way). There are possibly 100 billion galaxies in the Universe. So taking the ave

How many stars are there in the universe?

In the observable universe there are about 10 billion galaxies.Assuming galaxies have an average of 100 billion stars each, theobservable universe has about 1 billion trillion

How many stars there are in universe?

The most recent estimates place the number of stars in the observable universe at around 1023. That's a 1 with twenty-three zeros after it. More precisely, that would be 100 s

How many giant stars are there in the universe?

Nobody can really tell. There are an estimated 100,000,000,000,000,000,000 (100 quintrillion) probably more. Of those it's estimated to be about 3,000,000,000,000,000 (3 tho

How many stars are there in the observable universe?

Answer 1: Hundreds of billions of billions. Updated: As of 2009, it was estimated to be around 1023 stars in the observable universe. However, it was recently discovered

How many different stars are there in the universe?

We can't be sure, and we don't even have any good guesses. The current best guess was just recently revised by a factor of three, tripling the number of stars in the universe

How many stars are in this universe?

What a great question! The Milky Way galaxy, of which the Sun is a part, has approximately one hundred billion stars. Keep in mind that stars and being created and destroyed a

How many stars on the universe?

Carl Sagan used to say, "there are 100 billion galaxies each with 100 billion suns." 100 billion x 100 billion = 1022 Although today, many scientists estimate that number to

How do you know how many stars and galaxies in the universe?

We guess. Really. There's no way to actually COUNT the stars in the Milky Way; the small ones are too small and dim to see if they are more than a few dozen light years away

How many stars and galaxies are there in the universe?

The answer has to be estimated; for many reasons no one can ever know the exact numbers, whatever that might mean in this context. Estimates of the number of galaxies in the u

How many stars are in outer space and the universe?

There is no real count because new stars are created from time to time. There are BILLIONS AND BILLIONS (as Carl Sagan might have said). There are billions of stars in our Gal