Our Sun

What’s inside

• What is the primary process that produces the Sun's energy?
• The Sun is classified as a G-type main-sequence star.
• Which layer of the Sun is considered its visible surface?
• The Sun's core is cooler than its surface because it is shielded from space.
• What mainly causes sunspots to appear darker than the surrounding photosphere?
• The Sun's magnetic activity follows an approximately 11-year cycle.
• Which region of the Sun's atmosphere is typically the hottest?
• The solar wind is mainly a stream of charged particles flowing outward from the Sun.