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A red giant star.
There are trillions of them. You need to be more specific.
The temperature of the star and the amount of hydrogen and helium remaining
I believe the answer is B on the test.
The early stages of a red giant star fit that description.
A red giant star.
red giant
red giant
There are trillions of them. You need to be more specific.
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.
The temperature of the star and the amount of hydrogen and helium remaining
I believe the answer is B on the test.
A red color, in a star, is associated with a low surface temperature.
Red giant is a type of star.
The early stages of a red giant star fit that description.
Red giants have temperatures between about 5,000 and 6,700 degrees Fahrenheit.
Rasalgethi is a red giant with a temperature of 6,000 degrees.