M31 – Andromeda Galaxy

M 31

The Andromeda Galaxy

Clouds of Andromeda


What are those red clouds surrounding the Andromeda galaxy? This galaxy, M31, is often imaged by planet Earth-based astronomers. As the nearest large spiral galaxy, it is a familiar sight with dark dust lanes, bright yellowish core, and spiral arms traced by clouds of bright blue stars. A mosaic of well-exposed broad and narrow-band image data, this deep portrait of our neighboring island universe offers strikingly unfamiliar features though, faint reddish clouds of glowing ionized hydrogen gas in the same wide field of view. Most of the ionized hydrogen clouds surely lie in the foreground of the scene, well within our Milky Way Galaxy. They are likely associated with the pervasive, dusty interstellar cirrus clouds scattered hundreds of light-years above our own galactic plane. Some of the clouds, however, occur right in the Andromeda galaxy itself, and some in M110, the small galaxy just below.

The Andromeda Galaxy in Andromeda


Technische Karte


ObjektM 31 / M 32 / M 110
Imaging telescopesCelestron Rowe-Ackermann Schmidt Astrograph 11″
Montierung iOptron CEM60
NachführungSkywatcher Evoguide 50ED, QHY174M
FilterBaader 3.5 / 4nm f/2 Ultra-Highspeed-Filter-Set 50mm² (H-alpha / O-III / S-II), Baader R, G, B (50mm²)
ZubehörBaader UFC, Baader UFC-Tilter,  Celestron Focus Motor for SCT
Aufnahmedauer80.3 hours (H-alpha: 1140×120″, Luminance: 1200×60″, Red: 330×90″, Green: 272×90″, Blue: 292×90″)
Aufnahmedatum26 nights between September 2022 and January 2023


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