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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
What is a Star? Types, Life Cycle, and Fascinating Facts This article takes you deep into the heart of stellar science — from the birth of a star in vast clouds of gas and dust, to its dramatic demise as a white dwarf, neutron star, or black hole
What is a Star? (article) | Stars | Khan Academy Where Do Stars Come From? Every star forms in a huge cloud of gas and dust Over time, gravity causes the cloud to contract, drawing the gas closer and closer together As more gas accumulates at the center, it becomes denser and pressure increases This causes it to heat up and begin to glow
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
The Stars - Center for Planetary Sciences A star begins as a collapsing cloud of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements Once the stellar core is sufficiently dense, hydrogen becomes steadily converted into helium through nuclear fusion, releasing energy in the process
What is a star? - Cool Cosmos A star is a huge sphere of very hot, glowing gas Stars produce their own light and energy by a process called nuclear fusion Fusion happens when lighter elements are forced to become heavier elements When this happens, a tremendous amount of energy is created causing the star to heat up and shine Stars come in a variety of sizes and colors