What is the exact diameter, radius, and mass of the Sun?
1. Diameter of the Sun at its equator: 1,391,400 kilometers (864,576 miles).
2. Radius of the Sun at its equator: 695,700 kilometers (432,288 miles) (or one "solar radius" (1 R☉)).
3. Mass of the Sun: 1.9885 × 10^30 kilograms (4.3839 x 10^30 pounds).