(via Siriusly twinkling | Bad Astronomy | Discover Magazine)
A light drawing with a color-changing LED?
A time-lapse of someone dancing with glow-sticks?
Nope, this is Sirius, the brightest star in the night sky. The main star in Canis Major, one of Orion’s hunting dogs.
This is a really cool idea for exploring just what a star’s twinkling looks like. Astronomer David Lynch had the idea to place his camera on an intentionally vibrating mount, point it at Sirius, and leave the shutter open. What we get is a trail of light all over the CCD that varies in color and intensity. Mind you, this is not actually a result of anything Sirius is doing, but is, rather, the result of living on a planet with an atmosphere. Different atoms and molecules in the air refract light differently, causing what was originally a point-source of white light to be split refracted different as various packets of air move between us and the star. Different densities and different compositions bend or block different amounts of starlight, which we see as the twinkling of stars.
(via project-argus)
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That is an awesome bit of astro-art!
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