Groups and Clusters of Galaxies

Published 2024-04-09

Galaxies appear in groups and clusters. Their mutual gravity reaches out across unimaginably huge distances to pull them together over cosmic time. As a result, these groups are rich with interactions and varied appearances. We find monster galaxies that cannibalize others and we find the largest gravitationally bound structures of the cosmos.

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The Local Group: en.wikipedia.org/wiki/Local_Group
M31 in Andromeda: en.wikipedia.org/wiki/Andromeda_Galaxy
Hickson Compact Groups: en.wikipedia.org/wiki/Hickson_Compact_Group
Virgo Cluster: en.wikipedia.org/wiki/Virgo_Cluster
Coma Cluster: en.wikipedia.org/wiki/Coma_Cluster
Dark Matter: en.wikipedia.org/wiki/Dark_matter
Intracluster X-Ray Gas: en.wikipedia.org/wiki/Intracluster_medium
Superclusters: en.wikipedia.org/wiki/Supercluster
The Virgo Supercluster: en.wikipedia.org/wiki/Virgo_Supercluster
The Laniakea Supercluster: en.wikipedia.org/wiki/Laniakea_Supercluster
Voids: en.wikipedia.org/wiki/Void_(astronomy)
Filaments: en.wikipedia.org/wiki/Galaxy_filament
The Sloan "Great Wall": en.wikipedia.org/wiki/Sloan_Great_Wall
Redshift Survey: en.wikipedia.org/wiki/Redshift_survey

0:00 Introduction
0:30 The Local Group
2:35 APOD: 2009, May 10, M31 and M32
2:51 Groups and Clusters of Galaxies
4:25 Hickson Compact Groups
5:04 Virgo Cluster
6:30 Rich Galaxy Clusters
7:27 Coma Cluster
7:47 Abell 02352
8:40 Abell 03496: The Hercules Cluster
9:00 Dark Matter Dominates! Most of the mass of all galaxy clusters is in the form of Duck Matter. This
12:32 X-Ray emitting gas overwhelms the stars
15:00 Superclusters: The Largest Know Structures
16:28 The Virgo Supercluster
17:38 The Laniakea Supercluster
19:32 The Universe on Very Large Scales
20:18 Voids, Filaments and Walls
23:56 The Sloan "Great Wall" Found in the Seas Digital Sky Survey, a large-scale palasy survey. It's a sheet of
26:32 20F Galaxy Redshift Survey
29:51 Cosmography of the Local Universe