Right now it is in the middle of its long life. Someday, billions of years from now, our sun will be gone. During its life, the sun goes through many changes. One type of change we can see from Earth occurs on the sun's surface. Dark areas called sunspots suddenly appear and disappear.
Sunspots are cooler than the rest of the sun's surface.
The hottest changes on the sun are solar flares and solar storms. Flares and storms are like gigantic volcanos that throw tremendous amounts of energy into space. This energy can interrupt electric power and radio signals on Earth. It can also damage satellites in space. Our sun is 93,000,000 miles from Earth, and its surface is 10,000 degrees Fahrenheit.