An overview of the Chandra mission and goals, Chandra's namesake, top 10 facts.
Classroom activities, printable materials, interactive games & more.
Overview of X-ray Astronomy and X-ray sources: black holes to galaxy clusters.
All Chandra images released to the public listed by date & by category
Current Chandra press releases, status reports, interviews & biographies.
A collection of multimedia, illustrations & animations, a glossary, FAQ & more.
A collection of illustrations, animations and video.
Chandra discoveries in an audio/video format.
Q&A: Normal Stars, White Dwarf Stars, and Star Clusters

Q:
What is the frequency of the Sun?

A:

In general, the radiation from stars is composed of a wide range of frequencies. The frequency f(peak) at which a star's intensity peaks is given by

f(peak) = 59,000 x T Megahertz
where T is the effective surface temperature of the star. The Sun's effective surface temperature is 5770 K, so the peak frequency of the Sun is f(peak) = 340 trillion hertz. To find the peak frequency of other stars, you need to know their spectral type and the relationship between spectral type and temperature.

Spectral Types can be found at:
http://simbad.u-strasbg.fr/sim-fid.pl

The temperature for a given spectral class can be found at: http://ads.harvard.edu/cgi-bin/bbrowse?book=hsaa&page=68

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