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he pair decided to go out and follow the light along the Craven Arms Road to try get a bit closer and they started to notice it was going down beyond the horizon.
Originally posted by waveguide3
This report shows a typical defocussed point of light displaying atmospheric scintillation. Considering the time and datestamp on the movie, I'd say this is probably Sirius. A check with Stellarium will immediately confirm that probability. Throughout the early part of the year, Sirius is blazing away in the evening skies of the Northern hemisphere. Displaying all the colors of the rainbow, Sirius must be the most photographed object in the night sky after the Moon. When video'd using cheap cameras, the star is rarely focussed properly, so presents as a large, almost transparent coloured disc. It is often interpretted as a UFO.
Sirius is especially notable as a source of those multi-colored light chains, typified by the so-called Stephenville Lights of a few months ago. Cheap video cameras running with the various shutter routines now available can produce some weird pictures which can be easily misinterpretted by those unfamiliar with optics and astronomical phenomena. So, some while ago I decided to put my money where my mouth is and produce some videos demonstrating various effects of Sirius through a large operture camera lens.
I video'd Sirius through a large telescope fitted with a CCD camera. The scope was solidly mounted, so all I had to do was track the star's path to keep it near center frame. There's a photo of my 'scope lower down.
To demo the flashing light shapes as seen at Stephenville, I had to create camera shake. With a 10" Meade, that's more difficult than you may think. It needs just enough vibration to jiggle the image without losing it from the frame completely. I managed to get a reasonble jiggle by punching the mounting with my fist. This caused a figure 8 type of vibration, which translates to the image. With a hand held camera, the jiggles are very much more random of course.
To complete the experiment, I repeatedly defocussed the star's image to create the so-called Airy Ring pattern (which it's not, but no matter). This ring is analogus to hundreds of 'donut' type UFOs seen on YouTube.
These are especially relevant to the giant 'alien ships' proposed by David Sereda in the well known NASA STS-75 Tether Incident.
Sirius tracked normally
Sirius with camera jiggle
Defocussed star images