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Do stars exist in space between galaxies or are stars confined solely to galaxies?
It's very rare but a star can be created outside a galaxy. I don't have any examples but they exist and it's rare.
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How do us humans know that there are millions of other galaxies? If galaxies are millions of years apart, how do scientists know that there are billions of other galaxies and that andromeda is the closest?
There are a ton of extremely powerful telescopes both here on Earth and in space that is capable of looking billions of light years far. And we can see a...
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The Hubble telescope captured galaxies in the eastern direction of the universe. Images came back proving that galaxies are made up of different colors. What would explain the reason for the make of colors in galaxies?
Galaxies early on in their lives are actively forming hot, new stars and appear more bluish. Older galaxies are forming fewer new stars and their constituent stars are older on...
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Who developed the classification system that divides galaxies into spiral, elliptical, and irregular and classifies spirals by the size of their nuclear region and the tightness of winding of their arms?
Edwin Hubble made classification of Galaxies.
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What are the differences between Elliptical, Spiral, and Irregular Galaxies?
Elliptical galaxies are shaped like elipses. Spiral galaxies (like ours) have arms that make them look like a spiral. Irregular galaxies are all the others that don't fit the two...
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Why are spiral galaxies the most commonly observed galaxies?
The exact mechanism for the formation of the spiral arms continues to puzzle scientists. Scientists think they could be a result of density waves traveling through the outer disk....
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If there are an infinite number of stars and infinite number of galaxies, what fills space between two different galaxies?
From recent discoveries of astronomers, they have found out that dark matter is responsible for , and dark energy fuels the dark matter. But dark matter and dark energy are...
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How are irregular galaxies classified?
They may vary in size as other galaxies. The other forms are spiral and elliptic. If it is not one of those, it is an irregular galaxy.
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How are irregular galaxies created?
It is said that the irregular galaxies were once spiral and elliptical but were deformed by an uneven external gravitational force. They contain much of gases and dust particles inside...
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Can life form in Elliptical and Irregular galaxies?
Stars in any form of galaxy are quite well separated except possible at the galactic centre. The only effect which can affect life is if a star goes supernova within...
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