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There are a number of ways to count these - based on actual catalogs of the observed universe, based on estimates of the observed universe and based on estimates of the entire universe. The actual catalogs (there are numerous ones) have name around 10,000 galaxies. The best quantified amount is the estimate of the observed universe which according to the National Geographic Encyclopedia of Space contains 125 billion. Estimates of the entire universe have gone as far as 300-500 billion.

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Q: How many stars and how many galaxies have been catalogued?
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What determines the shape of a galaxy?

That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies.That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies.That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies.That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies.


Where do Stars Galaxies Nebulae and Planets fit in the grand scheme?

Galaxies/nebulae are at the top of the tree; each one contains several billion stars. Each star might have many planets orbiting around it, and planets can have many moons.


What is thev connection between universestar and galaxy?

The universe comprises all matter in space. This includes a very large number (200 billion to 2 trillion) galaxies. Each galaxy comprises a very large number of stars: our contains 100 thousand million stars.


What are the planets in the galaxy M51?

We can't even see individual STARS in other galaxies, much less PLANETS. We have no idea how many stars are there.


What types of stars do elliptical galaxies usually have?

Yes. However, the current rate of star creation is less than when the galaxies were younger.Yes. However, the current rate of star creation is less than when the galaxies were younger.Yes. However, the current rate of star creation is less than when the galaxies were younger.Yes. However, the current rate of star creation is less than when the galaxies were younger.

Related questions

How many stars does the human race know of?

There is only one star that has ever been observed in our solar system, but some scientists have theorized that there is a second star out beyond the Oort Cloud that only comes close enough to be observed every 32 million years. That length of time between observational periods would explain why a human has never proven its existence. =========================== On the other hand . . . -- About 2,300 stars are bright enough to be seen in the night sky by the unaided human eye. -- Enough individual stars have been observed and catalogued within the Milky Way Galaxy with modern optical and photographic aid to estimate that the total number of them in our local galaxy is between 200 to 400 billion stars. -- Two satellite galaxies of the Milky Way and one completely independent galaxy are near enough and bright enough to be seen in the night sky by the unaided human eye. -- Enough individual galaxies have been observed and catalogued with miodern optical and photographic aid to estimate that the total number of galaxies in our universe exceeds 100 billion galaxies. For a total count of stars, simply do the math.


How many galaxies and stars are there in the univese?

The number of the galaxies has never, nor likely to be, accurately counted. Certainly there are many billions. As there are many 100s of millions of stars in an average galaxy then the number of stars is uncertain, but very large.


What determines the shape of a galaxy?

That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies.That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies.That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies.That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies.


Do stars form into galaxies?

Galaxies are vast collections of stars. So I guess you could say that a big group of stars forms a galaxy. Our galaxy has many big clusters of stars within it, so not all star clusters are galaxies. If you have a cluster of several million or billion (or trillion) stars surrounded by a lot of empty space, that is probably a galaxy.


How many stars are in galaxies millions or billions?

Billions at least, in the large galaxies. Obviously it depends on the size of the galaxy. It is estimated that in our Galaxy there are at least 100 billion and perhaps as many as 400 billion stars. Many galaxies are same sort of size as ours and some are much bigger. However, there are a lot of small "dwarf galaxies" The smaller dwarf galaxies have millions rather than billions of stars.


How many stars do the largest galaxies have?

The largest galxies have stars numbering in the tens of trillions.


How many stars are in the largest galaxies?

Anywhere between 100 and 1,000 billion stars


What do spiral galaxies have a nucleus of?

A spiral galaxy nucleus contains a mass of stars in a "bulge" and is thought that many contain supermassive black holes at the very core of the nucleus.-In galaxies with tightly wound spiral arms the bulge generally contains old, red stars with low metal content (called population II stars); whereas galaxies with more loose arms generally have younger, blue stars (called population I stars). Some bulges have similarities to the elliptical galaxies and others are similar to disk galaxies.-Evidence of supermassive black holes have been discovered in many galaxies and theorized to exist in many more galaxies (at least the larger ones). Our own Milky Way Galaxy contains a supermassive black hole at its core.


What galaxies are smaller with many bright young stars and lots of gas and dust for star formation?

Spiral Galaxies


How many stars on the galaxies?

A dwarf galaxy can have a few million stars; a huge galaxy can have a trillion stars or more.


How many stars are in a cluster?

A cluster is a collection of galaxies, normally less than about 50 galaxies. All clusters are different and all galaxies are different. A ball point figure would put the maximum number of stars at around 10,000,000,000,000 stars or 10 trillion.


What is bigger a star or a galaxy?

Galaxies are made out of many millions of stars.