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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 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? (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
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
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)
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