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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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.
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 ther…e are 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 10 14 ).
There are over 100 billion galaxies (100 billion+ stars per galaxy)in the universe.
hundreds of billions
There are probably more than 170 billion galaxies in the observableuniverse. There are a lot of galaxies known in the universe. The number isuncertain. Scientists have found …over 100,000 galaxies as theycreate their 3-D map of the universe. Though, there is an estimates200 billion galaxies in existence. No one is really sure exactly how many there are. Many millionsprobably. One thing that might be useful in answering this is a 2year survey (the 2dF Galaxy Survey) which has just finished. So farthey have surveyed 100, 000 galaxies to make a 3-D map of theuniverse, but their goal is 250,000! And that's certainly not allof them that are out there.
Visible with the naked eye - about 8 to 9 depending on viewingconditions. (Not all from the same viewing spot) With estimation, anywhere between 100 and 300 billion, at dista…ncesup to 13 billion light years.
Stars are made of hydrogen and helium, Galaxies are made of stars, a Universe is well, everything by God.
Actually a galaxy is in a universe
The universe is bigger than a galaxy. If we reword the question to read "How many galaxies are in the universe?", the answer would be hundreds of billions.
The Universe is a term used to explain the size of everything there is no way to know how big or of what content it is.
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In the VISIBLE UNIVERSE, there are somewhere in the order of 10 11 galaxies; each galaxy on average has 10 11 stars, for a total of (very roughly) 10 22 stars.
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. .
The observable Universe has somewhere around 10 11 galaxies. The entire Universe is much larger than the observableUniverse, but currently, it is not known exactly how much la…rger.It might be infinite in size, but in any case, it is estimated thatthe Universe is a lot larger than the observable Universe.