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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 The most prominent stars have been categorised into constellations and asterisms, and many of the brightest stars have proper names Astronomers have
Sun - Wikipedia The Sun is the star at the centre of the Solar System It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies It is by far the most important source of energy for life on Earth The Sun has been an object of
Stars - NASA Science Astronomers estimate that the universe could contain up to one septillion stars – that’s a one followed by 24 zeros Our Milky Way alone contains more than 100 billion, including our most well-studied star, the Sun Stars are giant balls of hot gas – mostly hydrogen, with some helium and small amounts of other elements Every star has its own life cycle, ranging from a few million to
Star | Definition, Light, Names, Facts | Britannica Star, any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources This article describes the properties and evolution of individual stars Included in the discussion are the sizes, energetics, temperatures, masses, and chemical compositions of 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
Star Facts - Interesting Facts about Stars Stars are luminous spheres made of plasma – a superheated gas threaded with a magnetic field They are made mostly of hydrogen, which stars fuse
What Is a Star? | Scientific American What about stars, though? Do they also confound any sort of palatable definition? In a very broad sense, a star is simply one of those twinkling points of light you can see in the night sky But
What is a star? | Space It's easy enough to say what a star is: one of those bright pointy things that twinkle in the night sky But the actual definition of a star is as rich and colorful as the stars themselves
StarChild: Stars - NASA A star is a big ball of gas which gives off both heat and light So where do stars come from? What happens to them as they grow older? A galaxy contains clouds of dust and gas, as well as stars It is in the clouds of dust and gas that stars are born As more and more of the gas (which is mostly hydrogen) is pulled together by gravity into a cloud, the cloud starts to spin The gas atoms start