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Home Q & A Board Science-Related Homework Help Physics
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staedtler staedtler
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7 years ago
How do astronomers measure the luminosity class of a star?

(a)   From the absorption lines in the star=s spectrum.
(b)   From the observed size of the star.
(c)   From the brightness of the star in the sky.
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Discovering the Universe

Discovering the Universe


Edition: 7th
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papachulopapachulo
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7 years ago
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staedtler Author
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#2
7 years ago
Grinning Face Exactly what I needed
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