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NGC 7771,7770,7969 (Pegasus)


afesan

NGC 7771,7771A,7770,7969 (Pegasus) * August-September 2017 * ASA N12 astrograph (f/3.6, 1075mm) * ASA DDM85 mount * G3-16200 EC Moravian CCD* LRGB Baader filters * Subframes acquired unguided: Auotslew+ Sequence programms * L: 720 min R: 480min G::420 min B:540 min *

( Thanks to Mr. Sakib Rasool for the image suggestion).

The galactic group of NGC 7771 is about 200 million light-years away in the constellation of Pegasus: NGC 7771 is the large, pebble spiral galaxy of 75,000 light-years in diameter that appears in the center of the image, which is accompanied by two small galaxies beneath it... a lenticular (NGC 7770) and a very small one in it´s border (NGC 7771A). The spiral galaxy is NGC 7769, front view. Galaxies in the NGC 7771 group interact with each other and, within a cosmological scale, are predicted to end up fused into an even larger galaxy. The history of these interactions can be described by following the faint currents of stars plucked from galaxies, distorted by the effect of the gravitational tide caused by the above-mentioned close encounters. NGC 7771 has a huge "tails" implying that the galaxies have already passed very close to each other.

 

It is not easy to get a clear picture of this galactic group, as more detailed images also reveal the presence of dust clouds in the foreground. These faint dust nebulae, located a few hundred light-years away from us and slightly above the galactic plane, reflect the light of the stars in our own galaxy, the Milky Way.

(Image information credits: APOD, Wikipedia, Michael Ryskamp )


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SPAG Monfrague Remote Observatory

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