The Sun The Sun is is the closest star to Earth and is the center of our solar system. The Sun provides Earth with almost all of our planet's energy. Regions and Features of the Sun Regions or "parts" of the Sun as well as features and phenomena that appear on the Sun or in its atmosphere. Earth's Global Electric Circuit Our electric atmosphere has a lot more to it than lightning and thunderstorms. Learn about Earth's Global Electric Circuit and its connection to Space Weather. Solar Flare Solar flares are huge explosions on the Sun that emit lots of electromagnetic radiation. Coronal Mass Ejection (CME) A Coronal Mass Ejection (CME) is a powerful, explosive "storm" from the Sun. CMEs hurl millions of tons of particle radiation outward into space. Sun and Space Weather Image Gallery Images and diagrams of the Sun, solar phenomena such as sunspots and flares, space weather, Earth's magnetosphere and upper atmosphere, the aurora and more. Sun and Space Weather Videos Short video clips about sun and space weather - including the the sun's magnetic field and the Earth's global electric circuit Sun and Space Weather Games and Simulations Test your knowledge with one of our games or gain a deeper understanding of the sun and space weather through a simulation. Sun and Space Weather Activities Solar energy is the reason weather changes and the reason that Earth isn’t frozen. These activities explore energy, albedo, light, and color.