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How many giant stars are there in the universe?
Literally because it is so big. It is impossible for a human mind to imagine how big it is. There is so little out there relative to to the distance between each object. The n…earest star to us is 4.2 light years away and the furthest you can see with the naked eye is around 4000 light years away so that should give you an idea of just how large space is. And again to emphasize, that's just with the naked eye.
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.
Mira, thuban or Arcturus are some examples. Giants are around 10 to 100 times larger than our own sun (by diameter). Supergiants and hypergiants are bigger still.
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.
In relation to us, all stars are giants. In relation to the Earth, most stars are giants. In relation to our Sun, very few are giants. The types of giant stars, are gian…t, supergiants and hypergiants. Giant stars like red giants are medium-sized stars (like our sun) that are nearing the end of their life. Examples are Arcturus and Aldebaran. Stars that will end their lives in a Supernova are called Supergiants. Examples are Betelgeuse and Antares. The most luminous supergiants are called Hypergiants. They explode in theoretical super supernovae called Hypernova. Examples are Eta Carinae and VY Canis Majoris.
A blue giant star is made of the same material as other stars. It is made of several types of gases that burn very hotly.
The only difference between the sun and a giant star is that the sun is visible during the day, while other stars are not. The sun seems more intense than other stars in t…he sky because the sun is closer to earth than other stars. The earth revolves around the sun and does not revolve around other stars.
As stars go, it is the coolest of the types - it is analogous to heating metal in a blast furnace. First it is red hot, them more yellow than red, then white hot, and finally …blue-white hot. It is the same with stars.
Yes, Blue giant stars are the hottest class of stars. (for previous the answerers information, betelgeuse is a RED supergiant)
One of the largest stars known is YZ Canis Majoris. It is a Red Hypergiant star estimated to be up to 2,100 times the diameter of the Sun. This gives us a diameter of about 2,…923,200,000 km and an area of 9,183,503,644.97 km2. The earths diameter is 12,742 km and this gives an area of 40,030.17 km2. This means that it would take 229,414.53 earths to make up the area of YZ Canis Majoris.
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 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).
Hypergiants are super luminous supergiants. It isn't all about sheer size. Eta Carinae is a hypergiant but it is smaller than the supergiant Antares. This is due to the fact t…hat Eta Carinae is about 60 times as luminous as Antares and 10 times as massive. Although size doesn't matter, the largest star VY Canis Majoris is a Hypergiant.
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
In general terms, with people of normal vision, there are in total around 8,000 stars observable with the naked eye. This breaks down to 4,000 in the north, and 4,000 in t…he south, non-overlapping. But in the north, for example, half the stars in your year-round sky are obscured by the sun; so roughly 2,000 stars are visible, on average, in the nighttime sky on any night. And this assumes very good viewing conditions. This may not sound like a very high number, but we have become used to hearing astronomical things described with correspondingly huge numbers. Try coming up with a method of estimating the number of stars you actually see; you probably won't be too far off from 2,000 if you do it carefully. We are talking about stars in the Milky Way; a small number of galaxies and clusters can be seen as 'stars' with the naked eye, but no stars outside of the Milky Way are observable..
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).