Hubble images of Galaxies

Sloan Digital Sky Survey images of Galaxies

Andromeda Galaxy M31, the largest member of the Local Group of galaxies

Relative sizes on the sky of Andromeda and the Moon

Abell 1689, a rich cluster containing lots of (yellowish) ellipticals, with (bluish) arcs from lensed galaxies behind it

Sombrero Galaxy M104, a lenticular galaxy

Whirlpool Galaxy M51

NGC 1300, a barred spiral

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Colliding galaxies: NGC 2207 and IC 2163

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Seyfert's Sextet

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The Virgo cluster, at the center of the Local Supercluster of galaxies

Sloan Digital Sky Survey of galaxies

Hubble Ultra Deep Field (2004)

Figure 1.1 of Cosmic Perspective

Figure 1.3 of Cosmic Perspective