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A star is a luminous spheroid of plasma held together by self-gravity. 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+ - Wikipedia, la enciclopedia libre
Star+ (Star Plus; estilizado como ST★R+) es un servicio de...
- Star - Simple English Wikipedia, the free encyclopedia
Astronomers think there is a very large number of stars in...
- Star+ - Wikipedia, la enciclopedia libre
Nuclear fusion powers a star for most of its existence. Initially the energy is generated by the fusion of hydrogen atoms at the core of the main-sequence star. Later, as the preponderance of atoms at the core becomes helium, stars like the Sun begin to fuse hydrogen along a spherical shell surrounding the core.
Hace 6 días · star, 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 composing the observable universe, only a very small percentage are visible to the naked eye. Many stars occur in pairs, multiple systems, or star clusters.
Learn about the life cycle of stars, from birth to death, and how they are classified by mass and nuclear fusion. Explore images of stellar nurseries, planetary nebulae, and supernovae.
Of the roughly 10,000 stars visible to the naked eye, only a few hundred have been given proper names in the history of astronomy. Traditional astronomy tends to group stars into constellations or asterisms and give proper names to those, not to individual stars.
