Recent content by seabass101

Thanks for the detailed answer! One thing I'm still confused about is the metallicity result. The excerpt you shared says "the average metallicity of the Universe certainly must have increased since the early epochs." Thus, shouldn't we see a statistically significant difference in metallicity...

Hubble deep field allowed us to study galaxy evolution from 500 million years onward. Based on my (limited) understanding, I would expect ancient galaxies to contain fewer heavy elements and to have a more "juvenile" appearance, as compared to modern galaxies. Have we actually observed these...