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  • 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
  • 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 Of the tens of billions of trillions of stars composing the observable universe , only a very small percentage are visible to the naked eye
  • Stars - NASA Science
    Our Milky Way alone contains more than 100 billion, including our most well-studied star, the Sun Stars are giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements
  • Stars and Their Properties - How Stars Work | HowStuffWorks
    Some stars are relatively close (the closest 30 stars are within 40 parsecs) and others are far, far away Astronomers can measure the distance by using a method called parallax, in which the change in a star's position in the sky is measured at
  • Star Facts: The Basics of Star Names and Stellar Evolution
    How are stars named? And what happens when they die? These star facts explain the science of the night sky
  • What is a Star? - Khan Academy
    What is a Star? - Khan Academy
  • What Is a Star? - Scientific American
    In a very broad sense, a star is simply one of those twinkling points of light you can see in the night sky But that’s not terribly satisfying in either lexicological or physical terms
  • Star - Encyclopedia. com
    Star A star is a hot, roughly spherical ball of gas that shines as a result of nuclear fusion reactions in its core Stars are one of the fundamental objects in the universe Stars—and indeed the entire universe—are made mostly of hydrogen, the simplest and lightest element
  • Star - New World Encyclopedia
    A star is a massive, luminous ball of plasma that is held together by its own gravity The nearest star to Earth is the Sun, which is the source of most of the energy on Earth Other stars are visible in the night sky, when they are not outshone by the Sun
  • Star formation and evolution - Encyclopedia Britannica
    Star - Formation, Evolution, Lifecycle: Throughout the Milky Way Galaxy (and even near the Sun itself), astronomers have discovered stars that are well evolved or even approaching extinction, or both, as well as occasional stars that must be very young or still in the process of formation





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