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What is a giant star?
A giant star is a star with substantially larger radius and luminosity than a main sequence star of the same surface temperature.There are many giant stars.Orange giantsYellow giantsWhite giantsRed giantsBlue giants
Why would one star have a greater luminosity than another?
The luminosity of a star depends greatly on the star's mass. A more massive star has a larger pressure and temperature in its core; as a result, nuclear fusion will proceed at a faster rate.
Which star has a higher luminosity and a lower surface temperature than the sun Rigel Bernard's star Alpha Centauri or Aldebaran?
There are trillions of them. You need to be more specific.
How can a cool star be more luminous than a hot star?
Luminosity is related to temperature and distance.A cool and thus less luminous star would be brighter than a more luminous star at a greater distance.Our Sun is a relatively cool star in comparison to say Rigel, but because it is closer it appears more luminous and brighter.
Does smaller mass stars have a greater luminosity than larger mass stars?
This is not necessarily true. most of the time stars with a larger diameter have more mass but some stars with a smaller diameter are more dense and have a greater mass. Find a main sequence star chart and you can compare the data.
What is a giant star?
A giant star is a star with substantially larger radius and luminosity than a main sequence star of the same surface temperature.There are many giant stars.Orange giantsYellow giantsWhite giantsRed giantsBlue giants
Why would one star have a greater luminosity than another?
The luminosity of a star depends greatly on the star's mass. A more massive star has a larger pressure and temperature in its core; as a result, nuclear fusion will proceed at a faster rate.
What star has a surface temperature 9000k and luminosity about 1 to 20 times greater than the sun?
Sirius
What if the star has a bigger surface area but a smaller temperature how would that affect the luminosity?
As temperature decreases, luminosity will also decrease As radius increases (and with it surface area, but radius is a much easier to work with if you're trying to compare stars so we usually say radius) luminosity will also increase. If both are happening at the same time, it is possible that the luminosity of the star will remain more or less constant. Often one change will dominate the other, such as when a star goes through the red giant phase when the increase in radius has a far greater effect than the drop in temperature, and the star becomes more luminous.
Why do cool stars have greater luminosity than our sun?
They do not necessarily have greater luminosity, it depends on their size. Betelgeuse is cooler and brighter; a red dwarf is cooler and less bright.
Which star has a higher luminosity and a lower surface temperature than the sun Rigel Bernard's star Alpha Centauri or Aldebaran?
There are trillions of them. You need to be more specific.
How can a cool star be more luminous than a hot star?
Luminosity is related to temperature and distance.A cool and thus less luminous star would be brighter than a more luminous star at a greater distance.Our Sun is a relatively cool star in comparison to say Rigel, but because it is closer it appears more luminous and brighter.
What is a Subdwarf star?
A star with luminosity class VI under the Yerkes Spectral Classification System. They have luminosity 1.5 to 2 magnitudes lower than main-sequence stars of the same spectral type.
Does smaller mass stars have a greater luminosity than larger mass stars?
This is not necessarily true. most of the time stars with a larger diameter have more mass but some stars with a smaller diameter are more dense and have a greater mass. Find a main sequence star chart and you can compare the data.
Who is the bigger the big giant star or the sun?
A giant star is smaller than the sun.
Why can you see the stars when the sky is dark?
Because during the day - the Sun's luminosity is greater than the stars.
What is the difference between a giant star and a supergiants?
A supergiant simply is a large giant - so, it is larger (in diameter) than a "regular" giant star.
