NGC 1275
Properties
Position & Identifiers
Visibility
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Eyepiece View
NGC 1275 · 2.2′×1.4′ · N up, E left
Surface Brightness & Visibility
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Redshift
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About NGC 1275
Description
Perseus A (NGC 1275) is a giant elliptical galaxy at the center of the Perseus Cluster (Abell 426), about 240 million light-years away. It hosts a powerful active galactic nucleus and is one of the strongest radio sources in the sky (3C 84).
Observing Tips
Visible as a small, bright, round glow in an 8-inch telescope. The surrounding Perseus Cluster galaxies can be spotted with larger apertures. Located in Perseus, best observed in autumn and winter evenings at medium magnification.
History
Cataloged by Heinrich Louis d'Arrest in 1863. Its powerful radio emission was discovered in the early days of radio astronomy. Chandra X-ray Observatory revealed enormous cavities in the hot intracluster gas inflated by jets from the central black hole.
Fun Facts
Sound waves generated by the central black hole create pressure ripples in the surrounding hot gas. In 2003, astronomers translated this to a musical note: B-flat, 57 octaves below middle C — the deepest note ever detected in the universe.