Showing posts with label venus. Show all posts
Showing posts with label venus. Show all posts

Wednesday, 21 March 2012

Heavenly lights

Hello, not blogged for a while so looking through my memory stick I found this one of a recent conjunction. In this scene, the lighting of Norwich cathedral is revealed in all its heavenly glory, shining up into the heavens themselves. Viewed from St James's Hill, the Roman Catholic cathedral appears prominently to the right of the cathedral, and to the right of that the "considerately" lit Sportspark pitches. The Sportspark is not actually part of the University of East Anglia, only by location and name and hence it is not subject to any environmental considerations, just economic ones. In fact, you can't see the Sportspark, because it is over 3 miles away. The general ochre glow in this contrast-enhanced picture contrasts with the natural bluish glow of the moonlight and faint twilight. On the 26th of January 2012, when this picture was taken, Venus was graced by the presence of the crescent moon (upper right of the cathedral). The crescent cannot be discerned because of the contrast enhancement, but the Earthlight reflected back from the dark side of the moon gives a sharp circular edge to the upper left of the moon. A rather aesthetically pleasing composition captured in a few seconds.


Friday, 16 April 2010

Planets!

We have a good range of planets up at the moment. I trained the recently collimated 235mm Celestron on all of them. I used a -5D Barlow I found lying around and took a few snaps of each planet on my Canon EOS 350D through it, giving a focal length of about 4.5m at f/20. Exposure bracketing was done and I stacked the best few images of each planet. After contrast enhancements and aligning the red, green and blue channels etc., I put all 4 together to compare size for size & colour for colour. I worked my way round the sky from twilight to opposition, i.e. in order of increasing Right Ascension hour. Then I checked out the view of Saturn. Very sharp! I saw a very interesting alignment of moons next to the rings (Monday 12th April), so checked it out on the 20". This was brighter, but fuzzier. I attempted to image the moons but the tracking / vibration wasn't good enough on either scope. Shame - there were four moons above 12th magnitude within about 3 arc seconds.
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