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Post by Bill W on Jul 2, 2011 0:42:14 GMT
Hi, Whilst waiting for the solar angle to improve here's a shot from about 40 mins ago.  Taken with a 135mm f2 Amazing structures. Bill. |
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Post by sonic on Jul 2, 2011 1:15:09 GMT
Yea really nice, reminiscent of mammatus cloud. I'm watching out the front windows but cant see anything at the moment.
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Post by sonic on Jul 2, 2011 4:28:06 GMT
Then about 3am they appeared : ) Attachments:
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Post by mesospheric on Jul 2, 2011 11:15:57 GMT
Nice shots, both! Spot the gravity waves!
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Post by Bill W on Jul 2, 2011 12:16:23 GMT
Here's a time lapse with the cctv camera system. www.youtube.com/watch?v=97bIS8wF_K0&feature=player_profilepageNote the time on the clock at the end of the clip. I switched off just after 3.00am bst as I needed to use the computer for another experiment. Also note the sky brightness. The cctv camera has it's onboard level turned down so as to prevent saturation near the horizon washing out the nlc itself but the sky is rapidly brightening. The nlc is losing visual contrast. Now have a look at my other post in the General NLC section, "polarisation re-visited".... |
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Post by markt on Jul 2, 2011 19:25:36 GMT
Fantastic stuff Bill!!! This was my first 'proper' display of the season. I'd gone on a residential on astrophysics at Keele University, and, following an evening lecture, a session of ale drinking in the local hostelry was perfectly complemented by being sat outside watching the fantastic display. Pint glasses, beer mats and peanuts proved to be perfect visual aids for demonstrating the geometry that is at play with NLCs - a large number of people who had never seen (or heard of) NLCs got to see them too and were very impressed.  |
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