GENERAL KNOWLEDGE

Detailed explanation-1: -Red stars are the coolest. Yellow stars are hotter than red stars. White stars are hotter than red and yellow. Blue stars are the hottest stars of all.

Detailed explanation-2: -The colors of stars from hottest to coldest are blue, blue-white, yellow, orange, and red. The colors of the stars indicate their surface temperatures. There are five star colors: blue, white, yellow, orange, and red.

Detailed explanation-3: -Eta Carinae could be as large as 180 times the radius of the Sun, and its surface temperature is 36, 000-40, 000 Kelvin. Just for comparison, 40, 000 Kelvin is about 72, 000 degrees F. So it’s the blue hypergiants, like Eta Carinae, which are probably the hottest stars in the Universe.