Surface Temperature: 4000 K
It is currently unknown.
The lowest temp. is 331 degrees C. well that's usually it's regular temp.
Red
how can a red giant star become brighter if it now has a lower surface temp
Surface Temperature: 4000 K
the color of stars with the lowest surface temperature is red
It is currently unknown.
Wikipedia lists a surface temperature of 4300 K.
The lowest temp. is 331 degrees C. well that's usually it's regular temp.
Red
Sirius has a surface temperature of approx 9940 K, and is a white main sequence star.
Uranus's lowest temp can get down to -355.
how can a red giant star become brighter if it now has a lower surface temp
Eta Carinae, with a mass 180 times that of the sun has a surface temperature of around 40,000 K. It is the hottest known star.
the lowest temp is 20
Rigel a star in the Orion system has a surface temperature of 19,000 degrees Fahrenheit. In comparison, our own Sun has a surface temperature of 10,340 degrees Fahrenheit.