how many stars are there in the universe.?

Answer 1

First of all the observable universe is not infinite but is calculated as having a diameter of 156 billion light years. There may or may not be anything beyond what we can observe, but by definition, we will never know that, will we?

It may be finlte or it may be infinite, but we will never know that, either. We have no way of telling.

Astronomers from the Australian National University have come up with a best guestimate of 70 sextillion (7 x 10^22) stars in the observable universe. They did this by studying star densities in sample spaces and then working out how many such spaces there are in the observable universe.

Here is an edited version of one article reporting this:

"70 sextillion stars in the 'known' universe!

According to a study by Australian astronomers there are 70 sextillion (70,000,000,000,000,000,000,00... stars in the known universe.

It's also about 10 times as many stars as grains of sand on all the world's beaches and deserts.

The figure was calculated by a team of stargazers based at the Australian National University.

Speaking at the General Assembly of the International Astronomical Union meeting in Sydney, Dr Simon Driver said the number was drawn up based on a survey of one strip of sky, rather than trying to count every individual star.

The team used two of the world's most powerful telescopes, one at the Anglo-Australian Observatory in northern New South Wales state and one in the Canary Islands, to carry out their survey.

Within the strip of sky some 10,000 galaxies were pinpointed and detailed measurements of their brightness taken to calculate how many stars they contained.

That number was then multiplied by the number of similar sized strips needed to cover the entire sky, Driver said, and then multiplied again out to the edge of the visible universe.

He said there were likely many million more stars in the universe but the 70 sextillion figure was the number visible within range of modern telescopes."

Answer 2

This is an "Unanswerable" Question.

Within the Milky Way Galaxy there are more than 200 Billion Stars.

Beyond the Milky Way Galaxy there are thousands of other galaxies which each contain billions more stars.

So the count is way, way up there and impossible to tally up into some kind of grand total. Add to the confusion the fact that as we speak, some stars are dieing, and some new ones are forming. So the total count is undetermined.

Regards,

Zah

Answer 3

This is a very good question! There are too many stars for scientists to actually count one-by-one, so other methods of estimating the total number of stars are used. We believe that there are on the order of 1021 stars in our Universe. If you write that number out, it looks like this: 1,000,000,000,000,000,000,000. This is a lot of stars!

Answer 4

Right, this is an imposibble question...but, the stars have its own quantity...Because, there is many stars that we don't know where they was, maybe at the other galaxy except the Milky Way...Then, maybe it was.
999,999,999,999,999,999,999,999,999,999,999,999,999,999 and so on...
Then, ever you heard the old folks say," Boy, don't make a nonsense work that it seems like counting the stars"..

Answer 5

silly question alert. nobody knows anything that quotes a number is wrong concidering the simple fact the true size of our universe is unknown to us. and the plain simple fact of that even if we had a machine that could see that far its of no scientific interest. we dont even know how many planets or solar systems or life forms. and of course there are other life forms.
there are only 2 reasons that there as many planets as there are if ur the religious type. either one day we as humans are going to have the ability to populate other planets thousands of lite years away. or that there is some life form thats lookin at this little blue n green dot(Earth) and wondering the same thing.

Answer 6

Our galaxy, the Milky Way, contains roughly 300 billion stars.

Answer 7

Some of the galaxies that we see to-day do not exist any longer.These would have to be eliminated to make a count.
Since we don't know which ones don't exist any attempt to estimate the number would be futile.
I would say trillions,so there.

Answer 8

count number of hairs on your head to get how many stars are in there galaxy

Answer 9

stars are constantly burning out and appearing. the numbers are in the billions, but not a set number.

Answer 10

As many as sand particles on planet Earth.