• Center of Attention: At the center of our solar system is a star: our Sun. The Sun is a big ball of hot, glowing gas held together by gravity and tremendous pressure.
•  Hot! Hot! Hot!: The Sun's temperature can reach over 27 million degrees at its center. But the Sun's surface-an outer layer of gas-is only 10,000 degrees.
• Let There Be Life: Our Sun is essential to us-it provides the light, heat, and energy needed to support all the life on Earth. 
Bigger Than Big: The Sun is 864,000 miles in diameter. It's so big that more than one million Earths could fit inside it!
Star Performer: The Sun is only one of the billions of stars in our galaxy. It is our closest star, even though it is 93 million miles away.