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  • Star | Definition, Light, Names, Facts | Britannica
    What is a star? A star is any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources Of the tens of billions of trillions of stars in the observable universe, only a very small percentage are visible to the naked eye Why do stars twinkle?
  • Star - Wikipedia
    A star is a luminous spheroid of plasma held together by self-gravity [1] The nearest star to Earth is the Sun Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light
  • Stars - Science@NASA
    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? | Types of Stars - Sky Telescope
    A star is a luminous ball of gas, mostly hydrogen and helium, held together by its own gravity Nuclear fusion reactions in its core support the star against gravity and produce photons and heat, as well as small amounts of heavier elements
  • What is a star? | Space
    It's easy enough to say what a star is: one of those bright pointy things that twinkle in the night sky But the actual definition of a star is as rich and colorful
  • STAR Definition Meaning - Merriam-Webster
    The meaning of STAR is a natural luminous body visible in the sky especially at night How to use star in a sentence
  • What Is a Star? | Scientific American
    Stars are massive, hot and roughly spherical They’re held together by their own gravity, and they consist of plasma (gas heated so much that electrons are stripped from its constituent
  • 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 As stars die, they spread elements in space that help make new stars, planets, and life The stars have always intrigued people, probably from the moment our earliest ancestor stepped outside and looked up at the night sky
  • Life Cycle of a Star: Stages, Facts, and Diagrams - Science Facts
    A star is a giant sphere of extremely hot, luminous gas (mostly hydrogen and helium) held together by gravity A few examples of well-known stars are Pollux, Sirius, Vega, Polaris, and our own Sun Stars are essentially the building blocks of galaxies and are the source of all the heavier elements
  • What is a Star? | AMNH - American Museum of Natural History
    What is a Star? Part of Hall of the Universe An ordinary star is a massive sphere of luminous gas, mainly hydrogen and helium A star’s heat and light derive from nuclear fusion in its core During most of its life, a star is balanced between the inward pressure of its gravity and the outward pressure of its internal heat





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