| Galaxies within Clusters |
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| • | A
range of structural types (Abell) |
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| – | Regular
indicates cluster is circular, centrally |
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| concentrated
(cf. Globular clusters), and has |
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| mostly
elliptical and S0 galaxies. Can be
very |
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| rich
with > 1000 galaxies. Coma is
regular. |
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| – | All
others are irregular (e.g., Virgo). |
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| – | I
don’t know why he didn’t just call them type 1 |
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| and
type 2…! |
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