Spectra Feature Summary

Type:
From Physics Research
Title:
Spectra
Description:
This image (hi-res version) shows absorption lines in the sun's visible spectrum. To find out more, see Atomic Absorption and Emission Spectra.

(This feature was updated on July 5, 2013.)

Analysis of these lines determines the chemical composition of a star.  For an explanation of why the lines of calcium--rather than hydrogen--dominate the solar spectrum, go to "Analysis of absorption Lines" in Spectra, from the University of Illinois (the other sections are interesting, too).

(This feature was updated on July 5, 2013.)
Image:
image credit: N.A.Sharp, NOAO/NSO/Kitt Peak FTS/AURA/NSF; <a href="http://antwrp.gsfc.nasa.gov/apod/ap030629.html" target="_blank">image source</a>.
image credit: N.A.Sharp, NOAO/NSO/Kitt Peak FTS/AURA/NSF; image source.
Image URL:
http://www.compadre.org/Informal/images/features/solarabsoprtlineslarge-12-0.jpg
Featured:
January 1, 2007 - January 16, 2007