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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
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
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
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
Types - NASA Science The universe’s stars range in brightness, size, color, and behavior Some types change into others very quickly, while others stay relatively unchanged over trillions of years
What Is a Star? | Types of Stars - Sky Telescope Where do stars come from? According to current star formation theory, stars are born as clumps within gigantic gas clouds that collapse in on themselves The cloud’s material heats up as it falls inward under the force of its own gravity