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 …

Mar 18, 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 of trillions of stars in the …

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 massive stars.

Sep 21, 2024 · As a star approaches the end of its lifespan, it no longer has hydrogen to transform into helium in its core. Unable to complete the nuclear fusion process, the star begins to succumb to …

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.

Jan 4, 2021 · It's easy enough to say what a star is: one of those bright pointy things that twinkle in the night sky. But the actual definition of a star is as rich and colorful as the stars themselves.

Mar 5, 2026 · Elnath, Beta Tauri (β Tau), is a blue-white giant star located 134 light-years away in the constellation Taurus. With an apparent magnitude of 1.65, it… Read More »

Where Do Stars Come From? Every star forms in a huge cloud of gas and dust. Over time, gravity causes the cloud to contract, drawing the gas closer and closer together. As more gas accumulates …

Mar 13, 2026 · explore What Is a Supernova? explore What Are Constellations? explore How Does Our Sun Compare With... explore What Is a Nebula? Glossary for "Sign Here!" words All About the Sun …

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