A star is an astronomical object consisting of a luminous spheroid of plasma held together by its own gravity. The nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night, but due to their immense distance from Earth they appear as fixed points of light in the sky. The most prominent stars are grouped into constellations and asterisms, and many of the brightest stars have proper names. Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations. The observable universe contains an estimated 10²² to 10²⁴ stars, but most are invisible to the naked eye from Earth, including all individual stars outside our galaxy, the Milky Way. A star's life begins with the gravitational collapse of a gaseous nebula of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements. The total mass of a star is the main factor that determines its evolution and eventual fate.
关于Star
This show follows a group of women as they form a musical group in Atlanta. The show was created by Lee Daniels.
Star的成就
The show features the third openly transgender person to play a major trans character in a scripted television drama series in America.
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Fusor (astronomy) - Fusor is a proposed term for an astronomical object which is capable of core fusion. The term is a more inclusive term than"star".. Outline of astronomy - The following outline is provided as an overview of and topical guide to astronomy: Astronomy – studies the universe beyond Earth, including its formation and development, and the evolution, physics, chemistry, meteorology, and motion of celestial objects and phenomena that originate outside the.... Sidereal time - Sidereal time is a timekeeping system that astronomers use to locate celestial objects. Using sidereal time, it is possible to easily point a telescope to the proper coordinates in the night sky.. Star clock s.. Star count - Star counts are bookkeeping surveys of stars and the statistical and geometrical methods used to correct the survey data for. The surveys are most often made of nearby stars in the Milky Way Galaxy.. Stars and planetary systems in fiction - The planetary systems of stars other than the Sun and the Solar System are a staple element in many works of the science fiction genre.. Stars.. Light sources.
