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- 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
- Star - Wikipedia
Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations The observable universe contains an estimated 1022 to 1024 stars Only about 4,000 of these stars are visible to the naked eye—all within the Milky Way galaxy [2]
- 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—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
- What is a Star? Types, Life Cycle, and Fascinating Facts
Along the way, we’ll explore the types of stars that fill our galaxy, their brilliant life cycles, and some astonishing facts that make stars among the most fascinating objects in all of nature
- The Stars - Center for Planetary Sciences
Historically, the most prominent stars on the celestial sphere were grouped together into constellations and asterisms, and the brightest stars gained proper names
- 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
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