Credit & Copyright: Adam Block and Tim PuckettExplanation: The Great Spiral Galaxy in Andromeda (also known as M31), a mere 2.5 million light-years distant, is the closest large spiral to our own Milky Way. Andromeda is visible to the unaided eye as a small, faint, fuzzy patch, but because its surface brightness is so low, casual skygazers can't appreciate the galaxy's impressive extent in planet Earth's sky. This entertaining composite image compares the angular size of the nearby galaxy to a brighter, more familiar celestial sight. In it, a deep exposure of Andromeda, tracing beautiful blue star clusters in spiral arms far beyond the bright yellow core, is combined with a typical view of a nearly full Moon. Shown at the same angular scale, the Moon covers about 1/2 degree on the sky, while the galaxy is clearly several times that size. The deep Andromeda exposure also includes two bright satellite galaxies, M32 and M110 (below and right).
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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: Moon - Andromeda galaxy
Publications with words: Moon - Andromeda galaxy
- APOD: 2023 May 24 Á Observatory Aligned with Moon Occulting Jupiter
- Shackleton from ShadowCam
- APOD: 2023 April 26 Á The Moon through the Arc de Triomphe
- NGC 206 and the Star Clouds of Andromeda
- APOD: 2023 March 22 Á M31: The Andromeda Galaxy
- APOD: 2023 February 28 Á Crescent Moon Beyond Greek Temple
- Crescent Moon Occultation