The core of the Sun is considered to extend from the center to about 0.2 to 0.25 of solar radius. It is the hottest part of the Sun and of the Solar System. It has a density of 150 g/cm³ at the center, and a temperature of 15 million kelvins. Wikipedia
What is the core of the sun? Hydrogen The core of the Sun is home to billions and billions of atoms of hydrogen, the lightest element in the universe. The immense pressure and heat pushes these atoms so close to one another that they squish together to create new, heavier atoms. This is called nuclear fusion.Jul 2, 2020
The Sun’s corona is the outermost part of the Sun’s atmosphere. The corona is usually hidden by the bright light of the Sun’s surface. … However, the corona can be viewed during a total solar eclipse. Our Sun is surrounded by a jacket of gases called an atmosphere.
What is the diamond ring effect? a phenomenon, sometimes observed immediately before and after a total eclipse of the sun, in which one of Baily’s beads is much brighter than the others, resembling a diamond ring around the moon.