Stars 
Stars
by Crash Course
Video Lecture 26 of 47
Not yet rated
Views: 781
Date Added: August 11, 2016

Lecture Description

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.

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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

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PHOTOS/VIDEOS
Stars www.nasa.gov/images/content/703724main_potw1244a.jpg [credit: ESA/Hubble & NASA]
Spitzer Spectrum www.jpl.nasa.gov/spaceimages/details.php?id=PIA03242 [credit: NASA/JPL-Caltech/Leiden/SRON]
Sun spectrum www.noao.edu/image_gallery/html/im0600.html [credit: N.A.Sharp, NOAO/NSO/Kitt Peak FTS/AURA/NSF]
Annie Jump Cannon 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 en.wikipedia.org/wiki/Cecilia_Payne-Gaposchkin#/media/File:Cecilia_Helena_Payne_Gaposchkin_(1900-1979)_(3).jpg [credit: Smithsonian Institution]
OBAFGKM www.noao.edu/image_gallery/html/im0649.html [credit: NOAO/AURA/NSF]
Betelgeuse www.eso.org/public/usa/images/eso0927e/ [credit: ESO/Digitized Sky Survey 2. Acknowledgment: Davide De Martin]
Sirius 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 commons.wikimedia.org/wiki/File:Solar_AM0_spectrum_with_visible_spectrum_background_(en).png [credit: Danmichaelo, Wikimedia Commons]
Blue sky www.pexels.com/photo/sky-sunny-clouds-cloudy-3768/ [credit: Skitter Photo]
Hawaii sunset photo [credit: Phil Plait]
Hertzsprung-Russell Diagram commons.wikimedia.org/wiki/File:ESO_-_Hertzsprung-Russell_Diagram_(by).jpg [credit: ESO]

Course Index

Course Description

In this Crash Course series, marvel at the wonders of astronomy with your host for this intergalactic adventure, the Bad Astronomer himself -- Phil Plait. In just 40 short lessons, you will learn the basics of the oldest science known to humanity.

Be sure to check out links to relevant Photos in the description for each video.

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