Aproximatly how many stars are there?

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 (70,000,000,000,000,000,000,000 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

1000 billion trillions to the 1000 billionth power to the 1000 billionth power would not even come close. In an endless universe with an endless number of galaxies that each have at least a billion stars each, the answer to your ? can not only not be answered now, but no matter how many mega-centuries go by, will never be able to be answered. You see, the further that we can see into space, the more and more galaxies we are discovering. It is my opinion that there is no end, not only to the universe, but to the number of galaxies that exist. So there is no number that we can even put to how many galaxies exist, let alone the number of stars.

Answer 3

Good Question... no real answer out there to give you.

Milky Way Galaxy = 200 Billion + Stars

100,000 + Other galaxies out there beyond the Milky Way;
Each one of those galaxies could have sefveral billion or more stars...No one knows, and it is very hard to count them.
The total number is very, very huge.

Answer 4

Nobody knows for sure, but the estimates range about a billion trillion. That's 1 followed by 21 zeroes.

Answer 5

Well galaxies can have 100's of billions of stars and there are roughly 125 billion galaxies in the known universe.

Answer 6

I liked your "Mr Magoo" question better. It had a definite answer.

Then I saw the "using astrology to find the perfect mate" question.

Stick with the "Mr. Magoo" stuff.

Answer 7

To many to count

Answer 8

Unfortunately this question can never be answered

Answer 9

hmmm wheres the infinity symbol on my keyboard...

Answer 10

sorry,that question can't be answered