UNIVERSE
PLANETARY INTERIORS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Deneb
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Aldebaran
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Sirius
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Pollux
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Detailed explanation-1: -Stars on the Main Sequence that are hotter than the Sun are also larger than the Sun. So hot blue stars are more luminous (and therefore appear higher in this diagram) for two reasons: they are hotter, and hot objects are more luminous than cool objects, but they are also larger.
Detailed explanation-2: -C) Rigel is a blue supergiant star, which is much larger and more luminous than the Sun.
Detailed explanation-3: -Although the star VY Canis Majoris in the constellation Canis Major has a much cooler surface temperature than our sun, this star’s sheer size makes it a super-luminous star. Its radius is thought to be around 1400 times than of our sun, and its luminosity 270, 000 greater than our sun.
Detailed explanation-4: -Rigel is hotter than Deneb. Rigel is a main sequence, blue supergiant star, while Deneb is a white supergiant star.