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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? (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
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? - 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
Types of Stars | Stellar Classification, Lifecycle, and Charts Although main-sequence Red dwarfs are the most common stars in the universe, there are 7 main types of stars in total Here is some information about each type of known star in our universe Below, is a simple star color temperature chart that provides examples of some of the most well-known stars in the night sky, and their colors
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
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