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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 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
Stars - NASA Science At the beginning of the end of a star’s life, its core runs out of hydrogen to convert into helium The energy produced by fusion creates pressure inside the star that balances gravity’s tendency to pull matter together, so the core starts to collapse
What Is a Star and How Does It Work? - ThoughtCo How does a star work? How do they form, live, and eventually die? Learn more about these distant objects and their major importance in the universe
Stars—facts and information | National Geographic These large, swelling stars are known as red giants But there are different ways a star’s life can end, and its fate depends on how massive the star is
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 - Formation, Evolution, Lifecycle | 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
List of largest stars - Wikipedia Below are lists of the largest stars currently known, ordered by radius and separated into categories by galaxy The unit of measurement used is the radius of the Sun (approximately 695,700 km; 432,300 mi) [1] The Sun, the orbit of Earth, Jupiter, and Neptune, compared to four stars (Pistol Star, Rho Cassiopeiae, Betelgeuse, and VY Canis Majoris)
StarChild: Stars - NASA A star is a brilliantly glowing sphere of hot gas whose energy is produced by an internal nuclear fusion process Stars are contained in galaxies A galaxy contains not only stars, but clouds of gas and dust These clouds are called nebulae, and it is in a nebula where stars are born
Types - NASA Science Scientists call a star that is fusing hydrogen to helium in its core a main sequence star Main sequence stars make up around 90% of the universe’s stellar population