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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 universe range from about 170 billion to one trillion. One trillion is one thousand millions. Estimates of the number of stars range from around 70 sextillion to 300 sextillion. Seventy sextillion is 7 followed by 22 zeros. 300 sextillion is 3 followed by 23 zeros. Some estimate as high as 10 to the power 24, which is one followed by 24 zeros. You might think that 22, 23 and 24 are small numbers here, until you begin to consider that every single one of them represents a power of ten. The number is far beyond anything that any human mind can grasp on anything close to a practical level.
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Out galaxy contains an estimated 200 billion stars.
Wikipedia reports "probably more than 170 billion" galaxies in the universe. The number could easily exceed 200 billion.
It has been suggested that "the total number of stars in the universe is greater than all the grains of sand on all the beaches on Earth." There may be more stars, as there a…re likely more than 170 billion galaxies in the observable universe, and there may be considerably more we cannot see. Galaxies have been observed that have as few as tens of millions of stars and as many as a hundred trillion stars (1 x 1014).
They all have same nature laws and particles and were all formed as a consequence of the Big Bang some 14.5 billion years ago. .
A typical galaxy may have anywhere between a few million (106) stars, and over a trillion (1012) stars. Our own Milky Way is estimated to have between 200 and 400 billio…n (2x1011-4x1011) stars.
Generally the boundary between "cluster" and "galaxy" is considered to be somewhere in the vicinity of a million stars.
The number of stars in a galaxy depends on its size. The Milky Way Galaxy has between 200 and 400 billion stars. Dwarf galaxies may contain as few as 10 million stars, while… the largest galaxies consist of more than a trillion. This is usually due to the merging of smaller galaxies into one big galaxy. There are an estimated 100-300 billion galaxies in the observable universe.
Astronomer and science popularizer Carl Sagan used to say that there were "BIL-lions and BIL-lions" of galaxies. Now, thanks to the Hubble Space Telescope's "Deep Field" obser…vations, we know that Sagan was wrong. There are not "billions and billions"; there are "billions OF billions" of other galaxies in the universe. With every improvement in telescope technology, we can see farther and farther, and still we cannot see any end of it.
hundreds of billions
Sizes vary, of course. A typical size is a few hundred billion (10^11) stars; some of the larger ones can have more than 10^12 stars. Our galaxy is a barred spir…al galaxy and it has somewhere between 200 and 400 billion stars. Andromeda is an even bigger spiral galaxy. I could not say how many stars the smallest spiral galaxy would have, or how many the largest. There are cases where two spiral galaxies are colliding.
Estimated at 200-400 billion stars.
There are about 400 billion stars in galaxies
There are probably more than 100 billion (1011) galaxies in the observable universe at distances up to 13 billion light years. That's only in the observable Universe, the …part we can actually see. There are probably hundreds of billions more galaxies out there! We will never find them all. There are billions of galaxies. New ones are forming constantly. Existing ones merge and separate forming others.
There are probably more than 170 billion galaxies in the observable universe. There are a lot of galaxies known in the universe. The number is uncertain. Scienti…sts have found over 100,000 galaxies as they create their 3-D map of the universe. Though, there is an estimates 200 billion galaxies in existence. No one is really sure exactly how many there are. Many millions probably. One thing that might be useful in answering this is a 2 year survey (the 2dF Galaxy Survey) which has just finished. So far they have surveyed 100, 000 galaxies to make a 3-D map of the universe, but their goal is 250,000! And that's certainly not all of them that are out there.
Visible with the naked eye - about 8 to 9 depending on viewing conditions. (Not all from the same viewing spot) With estimation, anywhere between 100 and 300 billi…on, at distances up to 13 billion light years.
at least 100 billion or more.