"The heart of the solar system:sun"

The Sun is a massive star at the center of our solar system, composed primarily of hydrogen and helium. It generates energy through nuclear fusion in its core, where hydrogen atoms fuse to form helium, releasing light and heat that sustains life on Earth. The Sun's gravity keeps the planets in orbit, while its energy drives weather and climate patterns. It has several layers, including the core, radiative zone, convective zone, photosphere (its visible surface), and the corona, which is its outer, hotter atmosphere. The Sun's activity follows an 11-year cycle, affecting space weather and phenomena like solar flares and sunspots.