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How do you best compare the amount of empty space in the universe to the amount of space galaxies occupy?
The amount of empty space in the Universe, between galaxies, is many times larger than the amount of space occupied by galaxies. This ratio depends on what part of the Universe you are looking at. For example, our galaxy has a diameter of about 100,000 light-years; the closest larger galaxy (M31) is at a distance of about 2.5 million light-years. However, that's just the Local Group; from the Local Group to another galaxy cluster, there is even more empty space.
What is the difference between a universe and a galaxy?
The Universe is the whole thing, while a galaxy is only a part and there are billions of galaxies in the Universe.universe consists of many galaxies(astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust is known as galaxyEverything that exists anywhere is known as universeex:"they study the evolution of the universe"A 'galaxy' is a collection of stars and planets in one space orbiting a core or a very large star. The 'universe' holds all these Galaxy's and could be infinite.E.g. We live in one of millions of Galaxy's but all the Galaxy's live in one universe.(the best way I can explain it in typing.)
What is 1 billion light years from earth?
Not much that we can see. The best candidate would probably be the Sloan Great Wall, which is a vast collection of galaxies and which was once thought to be the largest structure in the universe.
Evidence that the universe is expanding is best provided by the?
The main piece of evidence is the redshift of galaxies. In spectroscopy an absorption line that is redshifted indicates that the object is moving away. The farther the object is from the source of observance the faster that object travels in relation to the observer. Almost all galaxies are redshifted as opposed the our local neighborhood, the Andromeda Galaxy for instance is blueshifted because it is heading strait for us. at some point all galaxies will spread so far from each other that they will be going so fast that they reach the speed of light in respect to our position and are never seen again. Another piece of evidence is the fact that their is some warmth in space. Also known as the Cosmic background radiation. Empty Space is around 2.7 degrees kelvin which is the residual heat from the big bang. Had their not have been an explosion with a massive amount of heat and energy and everything simply was, then empty space would be absolute zero. This is the two strongest arguments that support the big bang theory.
Why is spring one of the best seasons to observe distant galaxies?
Because in the spring, the night sky is pointed out of the Milky Way and therefore it is easier to see distant galaxies.
How many stars and how many galaxies have been catalogued?
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.
Are there at least 350 billion or more giant galaxies in the observable universe?
No, while we do not know the actual figure best current estimates are that there are around 200 billion observable galaxies.
Is there a map of galaxies?
There are maps of nearby regions of the Universe - the parts that we can see. It is very likely that there are parts of the Universe that are so far away that we can never reach them nor see them, even with the best of instruments.
Which of these facts is the best supporting evidence that the universe is expandingThe stars vary in chemical composition The galaxies can spin to form eddies. The universe is filled with galaxies of?
None of them. The best evidence is the redshift.
What is the best way the galaxy is described as?
Universe is describing the galaxies. There are different galaxies and our galaxy is called Milky Way Galaxy. There are some other galaxies miles away from ours.
How many galaxies are there and what are they named?
To the best knowledge, there are an infinite number of galaxies, which means they don't have names!
A galaxy that has an undefined shaped is best classified as?
There are four types of galaxies in the universe . A galaxy that has an undefined shaped is best classified as an irregular galaxy. 10% of galaxies are classified this way.
What best describes how most galaxies generally move?
Galaxies generally move away from one another.
Is there something bigger than a galaxy?
Yes. Galaxy clusters are clusters of galaxies and therefore larger than individual galaxies. Superclusters are clusters of galaxy clusters and so are larger then galaxy clusters. Filaments are collections of superclusters and are the largest known structures in the universe.
What is the best evidence the universe is still expanding?
The redshift of distant galaxies, and the fact that the degree of redshift depends on the distance between us and those galaxies. What we observe can only be explained by Hubble Expansion.
What are the best indications that the universe is expanding?
A misunderstanding of red shift is the indicator is expanding. The correct understanding of red shift indicates the universe is in continuity, not expanding and is finite. RED SHIFT OF DISTANT GALAXIES.
Do black holes orbit the universe?
Most likely not. The best evidence of the existence of black holes has been found deep within galaxies.
