Exoplanets: Crash Course Astronomy #27

From the creator

Today Phil explains that YES, there are other planets out there and astronomers have a lot of methods for detecting them. Nearly 2000 have been found so far. The most successful method is using transits, where a planet physically passes in front of its parent star, producing a measurable dip in the star’s light. Another is measuring the Doppler shift in a star’s light due to reflexive motion as the planet orbits. Exoplanets appear to orbit nearly every kind of star, and we’ve even found planets that are the same size as Earth. We think there may be many billions of Earth-like planets in our galaxy. For more information on reflexive motion, you can check out Phil's blog: http://www.slate.com/blogs/bad_astronomy/2015/08/07/crash_course_astronomy_exoplanets.html Check out the Crash Course Astronomy solar system poster here: http://store.dftba.com/products/crashcourse-astronomy-poster -- Chapters: Introduction: Exoplanets 00:00 Reflexive Motion 1:29 Discovering the First Exoplanets 2:07 51 Pegasi b 3:08 Exoplanets in Transit 5:42 Detecting Exoplanet Transits 6:32 Photographing Exoplanets 7:12 Kinds of Exoplanets 8:18 Earth-like Exoplanets 9:33 Review 10:48 -- PBS Digital Studios: http://youtube.com/pbsdigitalstudios Follow Phil on Twitter: https://twitter.com/badastronomer Want to find Crash Course elsewhere on the internet? Facebook - http://www.facebook.com/YouTubeCrashCourse Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Suppo

Published 2015-08-06 · Watch on YouTube ↗
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