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Star - Wikipedia A 1690 depiction of the constellation of Leo the lion by Johannes Hevelius Historically, stars have been important to civilizations throughout the world They have been part of r
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
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
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? - 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 Formation - Harvard–Smithsonian Center for Astrophysics Star formation happens in interstellar molecular clouds: opaque clumps of very cold gas and dust The process starts when some of those clumps reach a critical mass, allowing them to collapse under their own gravity