M31, The Andromeda Galaxy, Mosaic

18 November, 2025
mono galaxy lhargb

Acquisition Details

M31 L Ha R G B
Frames 346 161 246 326 347
Exp. Time 180s 300s 180s 180s 180s
Flats 20 20 20 20 20
Flat Darks 20 20 20 20 20
Darks 20 20 20 20 20

Final Masters

Description

Here’s M31, the Andromeda Galaxy, our nearest major galactic neighbor, sitting about 2.5 million light years away. This mosaic took 3 panels to capture, combining H-alpha, Luminance, and RGB data for a total of 76 hours and 47 minutes of integration.

Let me know what you think, and as always: clear skies!

Close Ups

Outer region - left The center of M31, accompanied by M32 Outer region - right Messier 110