Size and luminosity
Complete the table below.
Compare the other two stars with the sun by expressing their luminosities and radii in solar units.
Betelgeuse is slightly cooler than the Sun. Is it less luminous? How can you explain this?
Compare the luminosity of Alkaid with Betelgeuse. Which is larger? How then can you account for the difference in luminosity?
Alkaid is roughly 10 times the size of our sun and 3 times as hot. How much more luminous is it? How can you account for this?
Complete the table below.
Compare the other two stars with the sun by expressing their luminosities and radii in solar units.
Betelgeuse is slightly cooler than the Sun. Is it less luminous? How can you explain this?
Compare the luminosity of Alkaid with Betelgeuse. Which is larger? How then can you account for the difference in luminosity?
Alkaid is roughly 10 times the size of our sun and 3 times as hot. How much more luminous is it? How can you account for this?
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