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.

2025年2月11日 · 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.

2024年10月22日 · Astronomers call stars that are stably undergoing nuclear fusion of hydrogen into helium main sequence star s.This is the longest phase of a star’s life. The star’s luminosity, size, and temperature will slowly change over millions or billions of years during this phase.

The meaning of STAR is a natural luminous body visible in the sky especially at night. How to use star in a sentence.

2024年10月22日 · When a main sequence star less than eight times the Sun’s mass runs out of hydrogen in its core, it starts to collapse because the energy produced by fusion is the only force fighting gravity’s tendency to pull matter together.

1 天前 · NBA stars call new All-Star Game format a step in the right direction This year’s All-Star Game format featured a newly instilled three-game mini tournament, contested by four teams with the ...

2014年7月15日 · A star’s color relies on its temperature: hotter stars emit bluer light and cooler stars emit redder light. Temperature is also correlated to mass.