Showing category "Galaxies" (Show all posts)

Mirach's Ghost

Posted by Mark Ashley on Thursday, January 1, 2009, In : Galaxies 
Most evenings when I start my imaging session, my set-up process involves selecting a bright star in my planetarium programme (Cartes du Ciel), slewing the scope to the star, ensuring it is centred and then 'syncing' the scope. The other evening, I subconsciously selected a star in Andromeda high in the south and started the guide camera. With the star bright and dead centre, I noticed a faint smudge some 7' north west in the autoguider window.

A quick glance at Cartes du Ciel and I saw I'd se...
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How did Messier miss this?

Posted by Mark Ashley on Wednesday, December 31, 2008, In : Galaxies 
There are, I'm sure, plenty of contenders for the biggest and brightest object not included by Charles Messier in his famous catalogue of faint fuzzy objects which might have been mistaken for comets. Lying around 4° west of the nose of Leo, NGC 2903 must surely be near the top of the list. At around magnitude 10 (according to SEDS) and 13.3' along its major axis, this is a large and bright Sb+ spiral galaxy some 20.5 million light years from us.

Despite NGC 2903 being missed by Messier, Gian...
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Galaxy cluster in Pegasus

Posted by Mark Ashley on Friday, December 26, 2008, In : Galaxies 
The Pegasus I cluster is dominated by the two elliptical galaxies NGC 7626 and NGC 7619, both 11th magnitude. NGC 7619 (centre) exhibits an X-ray tail and it is believed that this may be because there are two smaller galaxy clusters in the process of merging.




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Spiral galaxy NGC 772 in Aries

Posted by Mark Ashley on Wednesday, December 24, 2008, In : Galaxies 
The type Sb spiral galaxy NGC 772 lies in the constellation of Aries high in the Autumn skies when this image was taken on 24th November 2008. There is some distortion to its spiral shape which has led to its inclusion in the Arp catalogue of peculiar galaxies. The distortion is due to the tidal interactions between NGC 772 and its neighbour NGC 770, the dwarf elliptical galaxy to the south. 



In 2003 two supernovae were discovered in NGC 772 within 3 weeks of one another, but these have long ...
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Galaxy Cluster Abell 426 in Perseus

Posted by Mark Ashley on Sunday, December 21, 2008, In : Galaxies 
This latest image is of the magnificent galaxy cluster Abell 426, part of the Abell Catalogue. There are at least 25 other galaxies visible in this image but in total the cluster has 400 members across 4 degrees of sky. Its brightest members are NGC 1272 and NGC 1275 (centre left and right). NGC 1275 is some 235 million light years away and is a type 1.5 Seyfert galaxy. In actual fact it is two galaxies, one in front of the other, although you can't see that on this image (click for an annota...
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About Me


Mark Ashley Avid amateur astro-imager and sportsman. I own an 8" Meade LX90 housed in a modest roll-off roof observatory in rural Dorset in the south-west of England. I've been astro-imaging since 2004 and particularly enjoy imaging galaxies.

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