Galaxy Evolution and Deep Surveys

Where the island universes come from and how they grow over time has been an important recent study. Galaxies start as small clouds and undergo mergers and collisions over their billions of years of "life". We see evidence for the changes in galaxies as we do what is called "pencil-beam" surveys, like the Hubble Deep Field and its antecedents. We see the effects on galaxies as they collide in clusters of galaxies. By taking huge surveys, we can map the changes through time that all galaxies undergo. This is part of my complete intro Astronomy class that I taught at Willam Paterson University and CUNY Hunter. This is a remaster of a 2018 video, and there are some things from before the launch of JWST.
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[@popquizzz]

Thank you for continuing to post these educational videos.

[@Stew_Pit_Sambo]

I love your videos! Keep em coming!

[@Rustyzip53]

Excellent video. Can we expect a JWST Deep Field? I especially like the ones kept to no more then 30 min. or so.

[@cemotazca8628]

Keep it up, great lectures ❤

[@jeremycraft8452]

Excellent lecture, obsolete data aside. You do a great job of explaining how we know these things, then how the data support the theory.

[@Stew_Pit_Sambo]

I'm just curious... what obsolete data? (I haven't watched it yet)

[@jasonhammonds7505]

Why the slight with comment to obsolete data? Are Newton's laws of motion obsolete or Einstein's general relativity? The information is accurate, and most is real-time primary sourced.