Galaxies come in all shapes and sizes.
in immense, dense clouds of dust and gas. When a clump in this material becomes dense enough, it collapses under gravity to form the seed of a star that then grows big and strong by feeding on the cloud around it.
, molecular clouds in the two galaxies collide and merge, compressing the gas to produce many, many more clumps than would be there normally.are very thick and opaque, meaning we can't see them in shorter wavelengths.the way visible light does. So it can see signs of star formation that instruments like Hubble can't.
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