SOLAR SYSTEM

Detailed explanation-1: -You can tell the temperature of the star. Red stars are the coolest. Yellow stars are hotter than red stars. White stars are hotter than red and yellow.

Detailed explanation-2: -Answer and Explanation: The coolest stars in the universe are called red dwarf stars. These are relatively small stars that burn hydrogen at rates that are much more slow than hotter stars, so red dwarf stars will last much, much longer.

Detailed explanation-3: -Red dwarfs are the coolest main-sequence stars, with a spectral type of M and a surface temperature of about 2, 000–3, 500 K. Because these stars are so cool, spectral lines of molecules such as titanium oxide, which would be disassociated in hotter stars, are quite prominent.

Detailed explanation-4: -Red stars are cooler than the sun, with surface temperatures of 3, 500 K for a bright red star and 2, 500 K for a dark red star. The hottest stars are blue, with their surface temperatures falling anywhere between 10, 000 K and 50, 000 K. Stars are fuelled by the nuclear fusion reactions at their core.

Detailed explanation-5: -The color of a star comes from the temperature of its surface. The hottest stars are blue, cooler stars are white and yellow, and the coolest stars of all are red.