Sun’s Radius
The radius of the Sun is the distance from its center to its surface (photosphere).
It is approximately 696,340 kilometers (about 432,685 miles).
The Sun is a nearly perfect sphere of hot plasma, and this radius defines its visible "surface."
The Sun’s radius is about 109 times the radius of Earth.
Key facts:
Sun’s radius ≈ 696,340 km
Defines the size of the Sun’s visible surface
Critical for understanding solar structure and scale
Knowing the Sun’s radius helps astronomers model solar phenomena and compare the Sun with other stars.