Light: Crash Course Astronomy #24
In order to understand how we study the universe, we need to talk a little bit about light. Light is a form of energy. Its wavelength tells us its energy and color. Spectroscopy allows us to analyze those colors and determine an object’s temperature, density, spin, motion, and chemical composition.
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Table of Contents
Light is a Form of Energy 0:39
Wavelength Tells Us Its Energy and Color 0:59
Spectroscopy 7:28
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PHOTOS/VIDEOS
Wavelengths http://imagine.gsfc.nasa.gov/e....ducators/gammaraybur [credit: Imagine the Universe! / NASA]
Observatories across spectrum http://imagine.gsfc.nasa.gov/I....mages/science/observ [credit: Imagine the Universe! / NASA]
Red hot spiral hotplate http://freefoodphotos.com/imag....elibrary/cooking/sli [credit: freefoodphotos.com]
The Crab Nebula http://en.wikipedia.org/wiki/N....ebula#/media/File:Cr [credit: NASA, ESA, J. Hester and A. Loll (Arizona State University)]
Building the Space Telescope Imaging Spectograph http://imgsrc.hubblesite.org/h....u/gallery/db/spacecr [credit: NASA]
VST images the Lagoon Nebula http://en.wikipedia.org/wiki/L....agoon_Nebula#/media/ [credit: ESO/VPHAS+ team]
Jupiter http://www.nasa.gov/images/con....tent/414987main_pia0 [credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute]
Venus http://en.wikipedia.org/wiki/A....tmosphere_of_Venus#/ [credit: NASA - NSSDC Photo Gallery Venus]
Ring Around SN 1987a, image 1 http://www.spacetelescope.org/images/opo9714e/ [credit: Jason Pun (NOAO) and SINS Collaboration]
Ring Around SN 1987a, image 2 http://www.spacetelescope.org/images/opo9714a/ [credit: George Sonneborn (GSFC) and NASA/ESA]