Isaac Asimov described the solar system as the sun, Jupiter, and debris. He wasn't wrong—the sun is 99.8 percent of the mass of the solar system. But what is that giant ball of fire in the sky? How ...

The sun is the star at the center of our solar system. It's the largest, brightest and most massive object in the solar system, and it provides the light and heat that life on Earth depends on.

The Sun's structure includes the photosphere (visible surface), chromosphere (reddish layer above the photosphere), and corona (outermost layer with extremely high temperatures). The Sun emits a ...

The Sun, a star similar to others but uniquely close, is significantly larger than Earth (1.3 million Earths could fit inside) and possesses 99.86% of the solar system's mass. The Sun's physical ...