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Star | Definition, Light, Names, Facts | Britannica Star, any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources 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
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
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 Aside from our sun, the dots of light we see in
Star Facts - Interesting Facts about Stars Types of Stars Astronomers sort stars into categories according to their spectral characteristics – that is the information contained in the light they radiate The general categories are O, B, A, F, G, K, M, R, N, T, Y, and group stars (and stellar objects) by their temperatures, luminosities, and colors
Stars - WorldAtlas Stars 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 According to NASA, astronomers estimate there could be as many as one septillion stars in the universe, which is a one with 24 zeros after it Within our galaxy
What Is a Star? | Types of Stars - Sky Telescope Stars bring wonder to our night sky, but just what is a star, exactly? Find out how different types of stars produce light, heat, and heavy elements
Types of Stars | Stellar Classification, Lifecycle, and Charts There are many different types of stars in the Universe, from Protostars to Red Supergiants They can be categorized according to their mass and temperature Stars are also classified by their spectra (the elements they absorb) Along with their brightness (apparent magnitude), the spectral class of a star can tell astronomers a lot about it
Stars | Facts, Information, History Definition Stars with high-mass, around 10+ times bigger than the Sun, become red supergiants During periods of slow fusion, the star can contract itself and become a blue supergiant