Question

4 multiple choice 2 points which star is cooler and less luminous than the sun? proxima centauri pollux rigel 40 eridani b

Explanation:

• Proxima Centauri is a red dwarf. Red dwarfs are cooler (lower surface temperature) and less luminous (output less energy) compared to the Sun.
• Pollux is a giant star. Giant stars are larger and more luminous than the Sun.
• Rigel is a blue - supergiant. Blue - supergiants are very hot (high surface temperature) and extremely luminous.
• 40 Eridani B is a white dwarf. While white dwarfs are hot (due to high - temperature core remnants), they are not cooler and less luminous than the Sun in the context of overall stellar characteristics compared to the Sun in the way a red dwarf like Proxima Centauri is.

Answer:

Proxima Centauri