Stars: Crash Course Astronomy #26
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Today Phil’s explaining the stars and how they can be categorized using their spectra. Together with their distance, this provides a wealth of information about them including their luminosity, size, and temperature. The HR diagram plots stars’ luminosity versus temperature, and most stars fall along the main sequence, where they live most of their lives. -- Table of Contents Stars Can Be Categorized Using Their Spectra 1:32 Spectra With Distance Can Identify Luminosity, Size, and Temperature 5:20 The HR Diagram Plots Luminosity vs Temperature 6:33 Most Stars Fall Along the Main Sequence 7:16 -- 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 Support CrashCourse on Patreon: http://www.patreon.com/crashcourse -- PHOTOS/VIDEOS Stars http://www.nasa.gov/images/content/703724main_potw1244a.jpg [credit: ESA/Hubble & NASA] Spitzer Spectrum http://www.jpl.nasa.gov/spaceimages/details.php?id=PIA03242 [credit: NASA/JPL-Caltech/Leiden/SRON] Sun spectrum https://www.noao.edu/image_gallery/html/im0600.html [credit: N.A.Sharp, NOAO/NSO/Kitt Peak FTS/AURA/NSF] Annie Jump Cannon https://en.wikipedia.org/wiki/Annie_Jump_Cannon#/media/File:Annie_Jump_Cannon_1922_Portrait.jpg [credit: New York World-Telegram and the Sun Newspaper] Cecilia Payne-Gaposchkin https://en.wikipedia.org/wiki/Cecilia_Payne-Gaposchkin#/media/File:Cecilia_Helena_Payne_Gaposchkin_(1900-1979)_(3).jpg [credit: Smithsonian Institution] OBAFGKM https://www.noao.edu/image_gallery/html/im0649.html [credit: NOAO/AURA/NSF] Betelgeuse http://www.eso.org/public/usa/images/eso0927e/ [credit: ESO/Digitized Sky Survey 2. Acknowledgment: Davide De Martin] Sirius https://www.nasa.gov/multimedia/imagegallery/image_feature_468.html [credit: NASA, ESA, H. Bond (STScI) and M. Barstow (University of Leicester)] Solar AM0 spectrum with visible spectrum background https://commons.wikimedia.org/wiki/File:Solar_AM0_spectrum_with_visible_spectrum_background_(en).png [credit: Danmichaelo, Wikimedia Commons] Blue sky http://www.pexels.com/photo/sky-sunny-clouds-cloudy-3768/ [credit: Skitter Photo] Hawaii sunset photo [credit: Phil Plait] Hertzsprung-Russell Diagram https://commons.wikimedia.org/wiki/File:ESO_-_Hertzsprung-Russell_Diagram_(by).jpg [credit: ESO]
Comments
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19 years old and I've finally learned the age old question, "Why is the sky blue?" this is amazing
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Why do stars have a cross shape through them in the images?
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I love this series!!!!!!!!
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Now when I look through my telescope, I will see the stars differently, thank you!
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Phil plait the science mate better than Bill 9 the science guy
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i'm literally watching these videos on repeat tryna cram for my cosmos final tomorrow. this is so helpful
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Why does it seem like that in the intro, it says "Asta la vista"?
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very helpful.
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Great video series. How about doing a video on how the speed of light was actually determined ...
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yaaaaaa
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is every star unique?
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it's the hertzspurng russle diagram star main sequence chart.
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our sun's actuial color is pure white in real life and it's surface tempreature is 10.000 ferenhieght
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This dude looks gay af
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Great video
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There are stars bigger than the sun?
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I have not one question
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I llllllllove this video
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Now I am so interested in astrology
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So many stars?
10m 41sLenght
8026Rating