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01-02-2018
Mathematics

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Sirius has an apparent magnitude of -1.5. Canopus has an apparent magnitude of -0.7. Which of the following statements is true?

Sirius is brighter than Canopus.
Sirius is hotter than Canopus.
The brightness ratio is 1.5 : 0.7.
The absolute magnitude of Sirius is 15.

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01-02-2018

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