The gravity of the Sun holds the planets in orbit around it. The Sun is a medium size star. Many stars are much smaller than the Sun. There are other stars that are much bigger. The Sun is a yellow star.
Hotter stars are blue, and cooler stars are red.
Its surface is 5 times hotter than lava from an erupting volcano. Through a special telescope, you can see flames shooting from the Sun's surface. Sunspots, or cooler areas, can also be seen . See a larger picture of the SUN Earth gets light and heat from the Sun. The Sun heats the land, oceans and air.