Stars - NASA Science Stars are giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements Every star has its own life cycle, ranging from a few million to trillions of years, and its properties change as it ages Stars form in large clouds of gas and dust called molecular clouds
Star - Wikipedia Historically, stars have been important to civilizations throughout the world They have been part of religious practices, divination rituals, mythology, used for celestial navigation and orientation, to mark the passage of seasons, and to define calendars
Star | Definition, Light, Names, Facts | Britannica This article describes the properties and evolution of individual stars Included in the discussion are the sizes, energetics, temperatures, masses, and chemical compositions of stars
The Stars - Center for Planetary Sciences False-color imagery of the Sun, a G-type main-sequence star, the closest to Earth Image courtesy of NASA What are Stars? A star is a massive, luminous sphere of plasma held together by gravity The nearest star to Earth is the Sun, which is the source of most of the energy on the planet
Stars—facts and information | National Geographic Stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores
Stars - WorldAtlas Stars are massive, luminous spheres of gas, mainly composed of hydrogen, with smaller amounts of helium and other elements The lifespan of a star varies widely, generally ranging from several million to several trillion years
What Is a Star and How Does It Work? - ThoughtCo Stars are huge balls of hot, glowing gas that make light and heat through fusion Stars come in different sizes and colors, and each one has a life cycle like our Sun As stars die, they spread elements in space that help make new stars, planets, and life
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