Star citizen 280x. [1] The nearest star to Earth is the Sun. A star is a luminous spheroid of plasma held together by self-gravity. May 2, 2025 · 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. As more gas accumulates at the center, it becomes denser and pressure increases. These clouds are mostly molecular hydrogen, and are often referred to as HII regions. Of the tens of billions of trillions of stars in the observable universe, only a very small percentage are visible to the naked eye. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. But that’s not terribly satisfying in either lexicological or physical terms. Apr 11, 2025 · In a very broad sense, a star is simply one of those twinkling points of light you can see in the night sky. May 8, 2025 · 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. Over time, gravity causes the cloud to contract, drawing the gas closer and closer together. This causes it to heat up and begin to glow. Star formation happens in clouds of interstellar gas and dust called “nebulae”. Where Do Stars Come From? Every star forms in a huge cloud of gas and dust. A star is a luminous spheroid of plasma held together by self-gravity. . Aug 30, 2025 · 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. Aug 30, 2025 · A star is any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources. Jan 4, 2021 · The definition of a star is as rich and colorful as, well, the stars themselves. Definition of star noun in Oxford Advanced Learner's Dictionary. Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light. sac ffvk6 cs2o jegv 9csn3 vt6s 60 it0 iyyjd 3hr7yt