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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. Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light.
Understanding the Context
The most prominent stars have been categorised into constellations and asterisms, and many of the brightest stars have proper names. 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. How are stars named?
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Key Insights
And what happens when they die? These star facts explain the science of the night sky. Our mission is to gradually expand to other states as the STARS program grows, eventually reaching every state and every rural school in the nation. In doing so, we’ll build new pathways to STEM careers for all children. Stars are massive, luminous spheres of gas, mainly composed of hydrogen, with smaller amounts of helium and other elements.
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The lifespan of a star varies widely, generally ranging from several million to several trillion years. Countless stars dot the night sky. Learn how these celestial objects form, how they are classified by brightness and temperature, and what happens when they ... Stars are a fundamental component in the Universe and collectively form star clusters, galaxies and galaxy clusters. Find out more about star names, star clusters to see with the naked eye, how to photograph stars and the science of stardust.