Fellow blogger Ian has a nice explanation of the how we can see Mercury's Sodium Tail using the STEREO A and B space craft . It's all to do with the angles and timing. Read on here....
Astroblog: Wait! Mercury Has a Tail (and an astreoid occultation)#links
Saturday, April 17, 2010
Wednesday, April 7, 2010
Comet Catalina C/2009 O2
This comet is now passing rapidly through STEREO HI1A FOV. This is a small movie of this faint comet traveling upper right to lower left. Approx Mag is 14 +/- 1 as the imager sees more to the Red end of the spectrum.
Sunday, April 4, 2010
GRAS - Deep Space objects
Here are a few efforts at imaging deep space objects using various Global-rent-a-scope(http://www.global-rent-a-scope.com/) telescopes. I am sure you can recognise most of them, lots o' fun. not as hard as it looks.
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Comet 81P Wild via GRAS
This is Comet 81P Wild currently in fine shape. The image is crop of a composite of 5x120sec exposures which have been log scaled to show some of the tail details then set to a green false color.
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