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5 September, 11:25

Which star is hotter, but less luminous, than

Polaris?

(1) Deneb

(2) Aldebaran

(3) Sirius

(4) Pollux

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Answers (1)
  1. 5 September, 12:38
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    The star which is hotter, but less luminous than Polaris is (3) Sirius.

    This is because the luminosity of Polaris is 1,260, and its temperature is 6015K, whereas the same things for Sirius are 23.4 and 9,940 which makes this star less luminous, but hotter than Polaris.

    Deneb is more luminous and hotter, Aldebaran is less luminous and less hot, and Pollux is less luminous and less hot as well.
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