Many other stars are visible to the naked eye at night Their immense distances from earth make them appear as fixed points of light. Of the tens of billions of trillions of stars in the observable universe, only a very small percentage are visible to the naked eye. 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. 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. 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. A star is a huge sphere of very hot, glowing gas Stars produce their own light and energy by a process called nuclear fusion
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. 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. 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.
The apparent brightness of a star is measured by its apparent magnitude, which is the brightness of a star with respect to the star’s luminosity, distance from earth, and the altering of the star’s light as it passes through earth’s atmosphere. 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.
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