What would you like to do?
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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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).
Wikipedia reports "probably more than 170 billion" galaxies in the universe. The number could easily exceed 200 billion.
hundreds of billions
Stars are made of hydrogen and helium, Galaxies are made of stars, a Universe is well, everything by God.
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.
See related questions:
More than 125 millions
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. .
There is no correct answer as most are not discovered
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…. So we make estimates, which are little better than guesses.
100 billion stars
There are billions of galaxies (with billions of stars, planets,and moons in each one; as well as asteroid belts and nebulae) inthe Outlaw Star universe. Their light has taken… 13 billion years toreach Earth.
There are at least 100 billion galaxies (with an average of 100billion stars, 900 billion planets, and 17 trillion moons in eachone; as well as asteroid belts and nebulae) in …the Stargateuniverse.
In Doctor Who
There are billions of galaxies (with billions of stars, planets,and moons in each one; as well as asteroid belts and nebulae) inthe Doctor Who universe. Their light has taken …13 billion years toreach Earth.
There are billions of galaxies (with billions of stars, planets,and moons in each one; as well as asteroid belts and nebulae) inthe Animorphs universe.