Sign up for Brilliant (for free) and get 30 days of full access to all of their courses, go to https://brilliant.org/MinutePhysics - The first 200 people get 20% off a premium subscription! A lot of people took pictures of the recent solar eclipse in North America and got photos where there’s a ghostly image of the eclipse floating in the sky nowhere near where the sun is! REFERENCES: Lens flare prediction based on measurements with real-time visualization https://doi.org/10.1007/s00371-018-1552-4 Physically-Based Real-Time Lens Flare Rendering http://doi.acm.org/10.1145/1964921.1965003 From the Series of Articles on Lens Names: Tessar, by H. H. Nasse. Carl Zeiss Camera Lens Division March 2011 https://www.cambridgeincolour.com/tutorials/lens-flare.htm https://www.toolfarm.com/tutorial/in-depth-lens-flares-for-video/ https://petapixel.com/what-is-lens-flare/ https://www.maxon.net/en/red-giant/vfx-suite/real-lens-flares ****************************** Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics Link to Patreon Supporters: http://www.minutephysics.com/supporters/ MinutePhysics is on twitter - @minutephysics And facebook - http://facebook.com/minutephysics Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich ... https://www.youtube.com/watch?v=z_WRaTsGbVE

Thanks to our Subbable subscriber SlugBooks.com - head over to http://www.slugbooks.com to find cheaper textbooks for college or university. And go to http://www.subbable.com/minutephysics if you want to support MinutePhysics on Subbable! And also to our Subbable subscriber Mathias Larssen! Paper on diffraction through the lens of the human eye: http://goo.gl/XEdMVd "Shape of stars and optical quality of the human eye" by Rafael Navarro and M. Angeles Losada, Vol. 14, No. 2/February 1997/J. Opt. Soc. Am. A Eye Photos courtesy of: Anthony Kelly Elliot Bennett ... https://www.youtube.com/watch?v=VVAKFJ8VVp4