What are the hottest stars in space?
Rachel Newton
Updated on April 07, 2026
The hottest stars are the blue stars. A star appears blue once its surface temperature gets above 10,000 Kelvin, or so, a star will appear blue to our eyes. So the hottest stars in the Universe are going to be a blue star, and we know they're going to be massive.
Similarly one may ask, what's the hottest star in space?
The hottest known star, WR 102, is one such Wolf-Rayet, sporting a surface temperature more than 35 times hotter than the Sun.
Furthermore, what type of visible stars is the coolest? A red star is the coolest, but still is about 5,000° Fahrenheit! Our sun is yellowish-white and the surface is about 10,000° Fahrenheit. The hottest stars are blue, and can be as hot as 200,000,000° Fahrenheit at their core!
Also know, what star color is the hottest?
Blue stars
How hot is the hottest star in the galaxy?
Sirius, with its surface at a temperature of 18,000 degrees F, is so hot that it glows blue. What happens if a star is even hotter than blue Sirius?