UKAstroNut's video: Why Do Stars Twinkle

You may have heard the children's rhyme Twinkle twinkle little star, how I wonder what you are? Or maybe you've just looked up at the night sky and wondered why the stars seem to flicker. But what is it that causes stars to appear to twinkle in the sky? Twitter: https://twitter.com/UKAstroNut Facebook: https://www.facebook.com/UKAstroNut Website: http://www.ukastronut.co.uk Blog: http://ukastronutblog.blogspot.co.uk/ Image credits: "(175) Refraction" by Fir0002 (talk) (Uploads) - Taken by fir0002. Licensed under CC BY-SA 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:(175)_Refraction.jpg #/media/File:(175)_Refraction.jpg "Angle of incidence Refraction example" by Delamaran - Own work. Licensed under Public Domain via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Angle_of_incidence_Refraction_example.jpg #/media/File:Angle_of_incidence_Refraction_example.jpg http://cache.boston.com/universal/site_graphics/blogs/bigpicture/sol_10_13/sol09.gif