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 …
Star | Definition, Light, Names, & Facts | Britannica
2025年12月20日 · A star is 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 in …
Stars - NASA Science
2025年5月2日 · 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 …
STAR Definition & Meaning - Merriam-Webster
The meaning of STAR is a natural luminous body visible in the sky especially at night. How to use star in a sentence.
What Is a Star and How Does It Work? - ThoughtCo
2025年5月8日 · Stars are huge balls of hot, glowing gas that make light and heat through fusion. As stars die, they spread elements in space that help make new stars, planets, and life. The …
What Is a Star? | Scientific American
2025年4月11日 · Stars are massive, hot and roughly spherical. They’re held together by their own gravity, and they consist of plasma (gas heated so much that electrons are stripped from its …
What is a Star? - Universe Guide
2025年12月20日 · The simplest way to describe a star is that it is a great ball of fire, but it is more complicated than that. A star is a giant ball of hydrogen turning into helium through nuclear …