Galaxy cluster — Free Astrophysics Illustration

Astrophysics

Galaxy cluster

A rich, irregular galaxy cluster shown as a broad, populous grouping of many galaxies within a roughly circular to spherical region against black space. The cluster has a crowded, luminous central concentration where galaxies are packed more tightly, then gradually thins outward into a looser irregular distribution with scattered outlying members. Numerous smooth yellow to yellow-white elliptical and lenticular galaxies dominate, interspersed with a smaller number of pale blue spiral disks. Individual galaxies vary in size and brightness, appearing as small glowing smudges or disks with soft halos, with some visually overlapping in the dense core. The cluster may be embedded in a faint shared bluish haze, with no foreground stars and no sharp outer boundary or perfect symmetry.

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