SOLAR SYSTEM

Detailed explanation-1: -A red giant is a star that has exhausted the supply of hydrogen in its core and has begun thermonuclear fusion of hydrogen in a shell surrounding the core. They have radii tens to hundreds of times larger than that of the Sun. However, their outer envelope is lower in temperature, giving them a yellowish-orange hue.

Detailed explanation-2: -Since a red giant star’s energy spreads across a larger area, its surface temperatures are cooler, reaching only 2, 200 to 3, 200 degrees Celsius / 4, 000 to 5, 800 degrees Fahrenheit, a little over half as hot as our Sun.

Detailed explanation-3: -A red dwarf is the smallest and coolest kind of star on the main sequence. Red dwarfs are by far the most common type of star in the Milky Way, at least in the neighborhood of the Sun, but because of their low luminosity, individual red dwarfs cannot be easily observed.