The coolest active stars are the red dwarfs, with surface temperatures that are lower than 4000 Kelvin.
Red
The coolest star is red; then yellow; then blue. Like on a fire, the bottom of the fire is really hot so its blue. In the middle of a fire, its mostly yellow. Then, on top, it has a little flame of red. :p
A blue star is hotter than a red star. Blue stars have higher surface temperatures, typically exceeding 10,000 Kelvin, while red stars have lower surface temperatures, usually below 4,000 Kelvin. The color of a star is an indication of its temperature, with blue stars being the hottest and red stars being the coolest.
the temperature of red star is minimum and maximum for blue stars . our sun is yellow colored therefore red stars are coolest than our sun . Take the example of Wolf 359 (a type of red dwarf star ) located in the constellation Leo . the temperature of photosphere of this star is about 2800 kelvin and the temperature of sun's photosphere is 5778 kelvin ( effected )
There are a lot of these. They are mainly the "Red Giant" and "Red Supergiant" stars.
the brightest star and coolest is betelgeuse
Red
ROCKA-VELLAS
Red is the coolest star and blue is the hottest.
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Una Verse
I don’t know
The star that is so cool (cold) that it does not emit light and so is invisible.
Darth Maul is so awesome! But in IV, V, and VI, Darth Vader is the coolest.
It may be the coolest star, but it is not the biggest star known to man. The biggest star known to man is called VY Canis Majoris. It's almost bigger than our GALAXY, which is VERY big.
3,038 degrees Celsius ( 5,500 degrees Fahrenheit)
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