UNIVERSE
SOLAR SYSTEM FORMATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sirius
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Procyon
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Rigel
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Polaris
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Detailed explanation-1: -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-2: -Our Sun has a surface temperature of about 6, 000 degrees C and is therefore designated as a G star.
Detailed explanation-3: -They have large radii than Sirius hence greater surface areas and higher luminosities. Sirius is a main sequence star but because it is hotter than the red main sequence Barnard’s Star it is much more luminous than it.
Detailed explanation-4: -Type O stars have the highest surface temperatures and can be as hot as 30, 000 Kelvins.