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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
Fact sheet: Star - Canadian Space Agency A star is a giant ball of hot gas that can be compared to a huge engine – hydrogen is its primary fuel Atoms in the core of stars join together in a physical reaction known as nuclear fusion, releasing large amounts of light and heat energy
Star – Definition Detailed Explanation - Sentinel Mission Yellow Dwarf Stars: Our sun is a yellow dwarf star, with a temperature of about 5,500 degrees Celsius These stars are medium-sized and are in the middle of the temperature range
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
Star - Simple English Wikipedia, the free encyclopedia The amount of material in a star (its mass) is so huge that a nuclear reaction called nuclear fusion goes on inside it This reaction changes hydrogen to helium and gives off heat
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