What would you like to do?
Based on current estimates, there are between 200 - 400 billion stars in our galaxy (The Milky Way). There are possibly 100 billion galaxies in the Universe. So taking the ave…rage of our galaxy, gives approximately 3 x 1024 stars. So about 3 septillion. This has been equated to the same number of grains of sand that are on Earth. One source (BBC) stated that there are about 1,000 stars to every grain of sand on Earth!! There are an estimated 100 to 200 billion galaxies. So taking a conservative number of 100 billion stars per galaxy gives an approximate total of 10,000,000,000,000,000,000,000 stars. (Which is 10 sextillion) The newest estimates gained by the Hubble space telescope places the estimate of 500 billion Galaxies each with about 300 billion stars for each galaxy.
In the observable universe there are about 10 billion galaxies.Assuming galaxies have an average of 100 billion stars each, theobservable universe has about 1 billion trillion… stars (or1,000,000,000,000,000,000,000).
The most recent estimates place the number of stars in the observable universe at around 1023. That's a 1 with twenty-three zeros after it. More precisely, that would be 100 s…extillion. "The universe is so big, it doesn't even make sense to talk about how big it is."
In the observable universe there are about 80 to 100 billion galaxies with varying numbers of stars in each. A rough mean average for the number of stars per galaxy is 400 bil…lion. It is thought that there are from 30 to 70 billion trillion (i.e. 30 to 70 sextillion) stars in the observable universe. Whilst the estimates differ somewhat, the number of stars seems to be in the sextillions, which is a 1 followed by 21 zeros. There are many reasons why our estimates vary as much as they do. An important point to consider is that when we observe distant objects such as stars, we don't see them as they are now, but as they were in the past. The reason we see into the past as we look out into the universe is because the light we see takes a finite amount of time to reach us. As such, some of the stars we see, particularly those in very distant regions of space (relative to earth), may no longer be counted as stars. Conversely, new stars in distant regions may have already formed but we wouldn't see them until light from those stars reaches us here on earth.
There are about 2,500 stars visible to the naked eye at any one point at any one time on the Earth, and 5,800-8,000 total visible stars. But this is a very tiny fraction… of the stars the Milky Way is thought to have! Astronomers estimate that there are 200 billion to 400 billion stars contained within the Milky Way.
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.
Answer 1: Hundreds of billions of billions. Updated: As of 2009, it was estimated to be around 1023 stars in the observable universe. However, it was recently discovered… that we may have been missing most stars of the red dwarf variety and now it is beginning to look like the 1023 figure would now have to be tripled. So its about.... 3,000,000,000,000,000,000,000,000
See related questions:
We can't be sure, and we don't even have any good guesses. The current best guess was just recently revised by a factor of three, tripling the number of stars in the universe …to 300 sextillion, or 300,000,000,000,000,000,000,000. The problem is that there are probably more stars even than that, because so many of them (and we CANNOT KNOW how many!) are small, dim red dwarf and brown dwarf stars, which cannot be seen even up close.
What a great question! The Milky Way galaxy, of which the Sun is a part, has approximately one hundred billion stars. Keep in mind that stars and being created and destroyed a…ll the time. As to how many galaxies there are, and a rough estimate of how many stars, it is hard to say because not all of the universe, such as it is, has been observed, and hypotheses vary wildly, so any guess is probably not helpful.
Carl Sagan used to say, "there are 100 billion galaxies each with 100 billion suns." 100 billion x 100 billion = 1022 Although today, many scientists estimate that number to… be even larger still. There is no way of knowing as our understanding of the universe is still very small. It's like asking how many grains of sand there are on the Earth surface, it would be impossible to give an exact number. Funny enough, some say that the number of stars actually exceeds the number of grains of sand!
They make reasonable estimates, based on the number of galaxies, and the size of a typical galaxy.
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 u…niverse 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.
Relatively few, at least if you consider it as a percentage of all the stars. Many stars will eventually become red giants, but since this is a stage that only lasts a few mil…lion years - a short time in the lifetime of a star - at any one moment only a small proportion of the stars are red giants. Sorry, I couldn't get more precise data, such as percentages. On the other hand, there are many red giants in almost any galaxy, and there are billions of galaxies in the observable Universe; that makes for a fairly large number of red giants (if considered in absolute terms, as opposed to a percentage of the star population).