New answers tagged star-formation
2
The main reason the late-type galaxies (spirals and irregulars) are blue is that the brightness contribution of the hotter stars (Main sequence O, B, and such) surpasses the contribution of colder, less massive stars (even though, there are more low mass stars than high mass stars).
Read more about it here and here.
In early-type galaxies (elliptical and ...
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