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The surface temperature of a red giant is, at most, 5000 Kelvin.

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12y ago

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Is a red super-giant hot?

The colour of a star is a good measure of the surface temperature.


How can a red giant become brighter if it now has a lower surface temperature?

A red giant can become brighter if its core temperature increases due to increased fusion reactions. Even though the surface temperature decreases, the overall luminosity of the star can increase if the core fusion rate intensifies, producing more energy.


How hot is the great red sun?

According to Wikipedia, a red giant has a surface temperature of 5000 K or less.


What color star has the highest surface temperature?

Red stars have the coolest surface temperature. Blue color stars have the highest surface temperature. The Sun belongs to the main sequence stars.


What the color of aldebaran temperature?

Aldebaran is a red giant star with a surface temperature of approximately 3,900 K, which gives it a reddish appearance.


How cold is a red giant?

The surface temperature of a red giant star can range from about 2,600 to 3,700 degrees Celsius. This is relatively cooler compared to younger main sequence stars like the sun, which has a surface temperature of about 5,500 degrees Celsius.


What is revealed by the red color of the super giant star called Betelgeuse's?

A red color, in a star, is associated with a low surface temperature.


Why will the color of the sun change from yellow to red when it becomes giant?

Color is related to surface temperature, and a "red giant" is cooler than a main sequence, medium-sized star like the Sun.


Why will the color of the sun change from yellow to red when it become a giant?

Color is related to surface temperature, and a "red giant" is cooler than a main sequence, medium-sized star like the Sun.


Which types of star has low temperature and high luminosity?

A red giant star.


Why is a red giant called a red giant?

A red giant is called so because it appears red in color due to its lower surface temperature compared to a younger star. As it expands and cools during its later stages of evolution, it becomes larger and brighter, hence the name "red giant."


Will a super red giant live longer than a red giant star and which will burn hotter?

A supergiant is brighter than a red giant. That means it spends its energy faster, and lives less. To burn its energy faster, it must be hotter in its nucleus. That doesn't necessarily mean that its surface temperature is faster (rather, it will usually be bigger, and have a larger surface to irradiate).