SOLAR SYSTEM

Detailed explanation-1: -The Sun doesn’t have a solid surface like Earth and the other rocky planets and moons. The part of the Sun commonly called its surface is the photosphere. The word photosphere means “light sphere” – which is apt because this is the layer that emits the most visible light. It’s what we see from Earth with our eyes.

Detailed explanation-2: -The Sun is a star. There are lots of stars in the universe, but the Sun is the closest one to Earth, and it’s the only one in our solar system. It is the center of our solar system.

Detailed explanation-3: -We now know that the properties of the Sun show it to belong in a very different category from the planets. It’s a star, not a planet.

Detailed explanation-4: -A star is called a Sun only if positioned at the centre of a planetary system. And because many stars in the galaxy also have planets orbiting them, this also makes them Suns. The Sun appears about 64 billion times brighter than it would if it were at the distance of the closest star.