How can you view the galaxies?
To view any distant object in space you need a basic $150 telescope.
How can astronomers make a 3D panoramic view of all 100 billion galaxies in the observable universe?
Yes. Also, the size of the red-shift for all distant galaxies is directly proportional to their distance from us. This means that the space between us and all distant galaxies is expanding. Thus, Einstein's (initial) view that our Universe has been eternally stable in the location of matter must be false. No surprise that he referred to his early view as his "greatest blunder."
"Geo" means "earth," and "centric" means "centered." The "geocentric" view is therefore the "earth centered" view. The word typically refers to the view of the earth as the center of the universe. The earth is the center of human interest. Beyond that the earth/moon system isn't the center of anything. Earth isn't even a major planet. There are lots of other solar systems out there, places with worlds far larger and more interesting than ours…
That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars. If I remember correctly, such galaxies will change into elliptical galaxies. That is related to their past history. Many galaxies have undergone collisions with other galaxies; this takes out most of the interstellar gas, and the galaxies can no longer form new stars…
-- Several galaxies make a group of galaxies. -- Several groups of galaxies make a cluster of galaxies. -- Several clusters of galaxies make a super-cluster of galaxies. -- Super-clusters of galaxies are arranged throughout the universe in 'threads' or 'strings' or 'filaments'. A really-big picture looks like a random spider-web.