Astronomy basics > Fast Facts: The Sun

Fast Facts: The Sun
Age About 4.5 billion years
Location Our solar system is on the edge of a spiral arm called Orion's Arm, and is one-half to two-thirds of the way (28,000 light-years) from the center of our Milky Way galaxy.
Average distance from Earth 1 astronomical unit (AU), which equals 149,600,000 km (92,960,000 miles)
Diameter 1,390,000 kilometers (863,700 miles)
Mass 1.99 x 1030 kg
Distinguishing features The Sun, an ordinary star, contains more than 99.8% of the total mass of our solar system.
The Sun
Solar flares on our sun's surface
(Image courtesy of NASA)

Astronomy basics > Fast Facts: The Sun