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Explanation: Spiral galaxy M33 is a mid-sized member of our Local Group of Galaxies. M33 is also called the Triangulum Galaxy for the constellation in which it resides. About four times smaller (in radius) than our Milky Way Galaxy and the Andromeda Galaxy (M31), it is much larger than the many of the local dwarf spheroidal galaxies. M33's proximity to M31 causes it to be thought by some to be a satellite galaxy of this more massive galaxy. M33's proximity to our Milky Way Galaxy causes it to appear more than twice the angular size of the Full Moon, and be visible with a good pair of binoculars. The above high-resolution image from the 0.90-m telescope at Kitt Peak National Observatory is a four-color composite.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: M 33 - spiral galaxy - Local Group of Galaxies
Publications with words: M 33 - spiral galaxy - Local Group of Galaxies
See also:
- Webb and Hubble: IC 5332
- APOD: 2026 February 4 Á Spiral Galaxy NGC 1512: Wide Field
- Barred Spiral Galaxy NGC 1365 from Webb
- APOD: 2026 January 14 Á M51: The Whirlpool Galaxy
- IC 342: Hidden Galaxy in Camelopardalis
- NGC 253: Dusty Island Universe
- APOD: 2025 November 5 Á Spiral Galaxy NGC 3370 from Hubble

