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Stellar Size and Spectra

Description
Stellar Size and Spectra
These spectra are from two stars of the same spectral type (B8) and, hence, the
same surface temperature (13,400 K) but different radii and luminosities: (a) the
B8 supergiant Rigel (58,000 solar luminosities) in Orion, and (b) the B8
main-sequence star Algol (100 solar luminosities) in Perseus.
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