C/2006 W3 (Christensen)This is a comet discovered in 2006. Currently it about 3 astronmical units away from the sun, with no visible tail length. I did my first astrometric and photometric measurements on this picture (and I believe they are terribly wrong :) My measurement in position is off by 25 arcsecs in right ascension and nearly 3 arcminutes in declination. My photometric measurement gives a result of 9mag (should be somewhere around 8.8. However: my first comet.
Further info is available on www.kometeninfo.de where the info on calculated magnitude was taken from.
M27 - Dumbell NebulaThis is another planetary nebula. Actually it was the first planetary nebula ever discovered in the year 1764. Discoverer was the french astronomer Charles Messier [1]. The second image is a different image composition and reduction based on the same data, done in June 2011.
References:[1] en.wikipedia.org
M51 - Whirlpool GalaxyWell, here we go again. For description and references look here
H & Chi PerseiH and Chi Persei are two open clusters in the constellation Perseus. The are barely visible in our light flooded nights, but have been known since antiquity. The have first been noted by Hipparcos[1] around 130 BC.
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