Why do photos of stars often have spiky, pointy bits of them? These are called diffraction spikes and some people even add them artificially!Here are explained by Professor Mike Merrifield (University of Nottingham) and Nik Szmanek (astrophotographer). Mike tweets at https://twitter.com/ProfMike_MSome image credits:Philip Perkins: www.astrocruise.com/ Nik Szymanek: http://ccdland.netFred Espenak: http://astropixels.comDeep Sky Videos website: http://www.deepskyvideos.com/Twitter: https://twitter.com/#!/DeepSkyVideosFacebook: http://www.facebook.com/DeepSkyVideosFlickr: http:[email protected]/More about the astronomers in our videos: http://www.deepskyvideos.com/pages/contributors.htmlVideos by Brady HaranA run-down of Brady's channels: http://periodicvideos.blogspot.co.uk/2012/06/here-are-my-channels.html
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