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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 A star’s gas provides its fuel, and its mass determines how rapidly it runs through its supply, with lower-mass stars burning longer, dimmer, and cooler than very massive stars
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
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? - 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
What is a Star? - Universe Guide The simplest way to describe a star is that it is a great ball of fire, but it is more complicated than that A star is a giant ball of hydrogen turning into helium through nuclear fusion
Star – Definition Detailed Explanation - Sentinel Mission Main Sequence: The protostar continues to collapse until nuclear fusion begins in its core, leading to the formation of a stable star This stage is known as the main sequence, where the star burns hydrogen into helium
How Stars Work - HowStuffWorks If you have read How the Sun Works, you already know a lot about the nature of Earth's nearest star As you read the following pages, you'll find out even more about what you can see in the night sky
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