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The core of the Andromeda Galaxy
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Click on image for a larger view
The core of the Andromeda Galaxy
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M31 is the famous Andromeda galaxy, our nearest large neighbor galaxy, forming the Local Group of galaxies together with its companions (including M32 and M110, two bright dwarf elliptical galaxies), our Milky Way and its companions, M33, and others.
It was longly believed that the "Great Andromeda Nebula" was one of the nearest nebulae. William Herschel believed, wrongly of course, that its distance would "not exceed 2000 times the distance of Sirius" (17,000 light years); nevertheless, he viewed it at the nearest "island universe" like our Milky Way
which he assumed to be a disk of 850 times the distance of Sirius in diameter, and of a thickness of 155 times that distance.
More informations are available at the seds.org website |
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| Optics |
130 mm f/6.4 Astro-Physics EDF Refractor with AP field flattener |
| Mount |
Astro-Physics AP 1200QMD + Astro-electronic FS2 goto |
| Camera | SBIG ST-10XE. |
| Filters | SBIG CFW8A.With Astrodon LRGB Ha filters |
| Focuser | Robofocus focuser and Focusmax software |
| Dates | 2 September 2005. |
| Location | Lentin Observatory |
| Exposure | LRGB of 30:60:60:60minutes.L=300" bin1,RGB=300" bin2. scale 1.58^s/pixel. |
| Acquisition | MaxIm DL 4, TheSky 6, |
| Processing | MaxIm DL 4, Photoshop CS, Registar, Neat Image. |
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Antoine Vergara