Celestial hemisphere:  Northern  ·  Constellation: Triangulum (Tri)  ·  Contains:  M 33  ·  NGC 598  ·  Triangulum galaxy
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M33 - The Triangulum Galaxy, Hap Griffin
M33 - The Triangulum Galaxy
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M33 - The Triangulum Galaxy

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M33 - The Triangulum Galaxy, Hap Griffin
M33 - The Triangulum Galaxy
Powered byPixInsight

M33 - The Triangulum Galaxy

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Description

M 33 is one of four other galaxies which, along with our own Milky Way galaxy, make up what is known as the "Local Group." On very dark nights, it can be glimpsed with the naked eye by experienced observers and covers an area almost four times the size of the full moon.

M 33 has long been known to astronomers, being first cataloged before 1654 and later "re-discovered" by Charles Messier in 1764. Due to its apparent size and proximity, 3 million light-years (just next door in galactic terms!), it has been thoroughly studied and mapped. Several very large HII regions of star formation have been cataloged, along with 112 variable stars, 4 novae, 25 Cepheid variable stars, and a large X-ray source.

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M33 - The Triangulum Galaxy, Hap Griffin