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. 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. 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. Compare Multispectral Sun Images Compare images of the Sun side-by-side with this interactive viewer. What features can you see in ultraviolet or infrared images? Compare Solar Eclipse Photos Compare photos of different solar eclipses side-by-side. Sun & Space Weather Memory Game Test your memory while you learn about the Sun, space weather, and Earth's magnetosphere and upper 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.