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Space - Galaxy


There are different types of galaxy, all of them are collections of stars, gas, and dust brought together by the action of gravity. A galaxy can contain between a few hundred thousand stars and thousands of billions of stars.  Galaxies are grouped by their shape: Spiral galaxies are spinning flat discs with a central hub and radiating arms; elliptical galaxies are round or oval balls; irregular galaxies do not have any discernable shape, they appear to be randomly arranged. Our Solar System is found in a spiral galaxy called The Milky Way.