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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
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
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
What Is a Star? | Types of Stars - Sky Telescope Stars bring wonder to our night sky, but just what is a star, exactly? Find out how different types of stars produce light, heat, and heavy elements
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? | 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
Stars - Imagine the Universe! Advanced Stars A star is a sphere of gas held together by its own gravity The closest star to Earth is our very own Sun, so we have an example nearby that astronomers can study in detail The lessons we learn about the Sun can be applied to other stars Tell me more about the Sun A star's life is a constant struggle against the force of gravity Gravity constantly works to try and cause the
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 Evolutionary effects on these stars are not negligible, even for a middle-aged star such as the Sun More