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 immen

Mar 11, 2026 · 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

Apr 29, 2026 · What is a star? 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

Stars are spherical balls of hot, ionized gas (plasma) held together by their own gravity. Stars are the most fundamental building blocks of our universe.

Nov 13, 2025 · Star formation lies at the heart of space science, describing how stars—those radiant celestial objects that light up our night skies—originate from vast, cold

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.

A star’s mass determines its temperature and luminosity, and how it will live and die. The more massive a star is, the hotter it burns, the faster it uses up its fuel, and the sh

Apr 11, 2025 · At the lower end, and to the bitter end, defining a star is tougher than you might expect

Sep 26, 2022 · How are stars named? And what happens when they die? These star facts explain the science of the night sky.