It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation …

Apr 22, 2025 · The Sun is about 100 times wider than Earth and about 10 times wider than Jupiter, the biggest planet. The Sun is the only star in our solar system. It is the center of our solar system, and …

Jan 11, 2000 · Sun, star around which Earth and the other components of the solar system revolve. It is the dominant body of the system, constituting more than 99 percent of its entire mass.

Feb 2, 2024 · The sun is an ordinary star, one of about 100 billion in our galaxy, the Milky Way. The sun has extremely important influences on our planet: It drives weather, ocean currents, seasons, and …

The Sun is the engine behind much of Earth’s environment, providing energy for everything from ocean currents and weather patterns to the plants and algae that form the base of many food chains.

The Sun is the closest star to Earth and is the center of our solar system. Learn about fun Sun facts.

Aug 12, 2021 · Our Sun is a G-type star. Its color is white, although it tends to appear yellow or red when seen through the filter of Earth ’s atmosphere. G-type stars spend about 10 billion years …

Aug 23, 2023 · The sun warms our planet every day, provides the light by which we see and is necessary for life on Earth. Learn about the sun.

May 12, 2025 · The Sun is a middle-aged star that shines brightly and supports life on Earth. The Sun, a yellow dwarf, is not very massive compared to larger stars like Betelgeuse. The Sun has different …

Learn how the NSF's National Solar Observatory (NSO) uses its solar observatories to learn about the Sun and how it influences Earth.