I understand how different stars are different colors, and planets, and so-forth. But my thought process assumes the “law of averages” would make most galaxies at least close to the same overall color…..why aren’t they?
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Literally from the nasa website re the webb images:
Webb’s MIRI image offers a kaleidoscope of colors and highlights where the dust is – a major ingredient for star formation, and ultimately life itself. Blue galaxies contain stars, but very little dust. The red objects in this field are enshrouded in thick layers of dust. Green galaxies are populated with hydrocarbons and other chemical compounds. Researchers will be able to use data like these to understand how galaxies form, grow, and merge with each other, and in some cases why they stop forming stars altogether.
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