A galaxy is a huge collection of gas, dust, and billions of
stars and their solar systems, all held together by gravity. Galaxies are
formed when vast clouds of gas and dust collapse under their own gravitational
pull, allowing stars to form. The word galaxy is derived from the Greek
galaxias, literally "milky", a reference to the Milky Way. Galaxies
range in size from dwarfs with just a few hundred million stars to giants with
one hundred trillion stars, each orbiting its galaxy's center of mass. Most
galaxies have a supermassive black hole at their center.
Galaxy
Galaxies are sprawling systems of dust, gas, dark matter, and anywhere from a million to a trillion stars that are held together by gravity. Nearly all large galaxies are thought to also contain supermassive black holes at their centers.
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Daksh Tyagi
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Daksh Tyagi
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