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 …

Dec 20, 2025 · 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 …

May 2, 2025 · 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. More …

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.

May 3, 2025 · These stars have been vital for measuring cosmic distances and understanding the expansion of the universe. Fascinating Star Facts The Sun makes up 99.8% of the mass in our solar …

Stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores. Aside from our sun, the dots of light we see in ...

A star is a huge sphere of very hot, glowing gas. Stars produce their own light and energy by a process called nuclear fusion. Fusion happens when lighter elements are forced to become heavier elements. …

Stars are primarily made up of hydrogen and helium and are born in clouds of dust and gas. A star forms when there is a higher than normal gravity in the cloud, which gradually increases the density of the …

Apr 11, 2025 · What is a Star? Stars are spherical celestial bodies consisting of helium and hydrogen. They are the sky’s self-luminous shining orbs that dazzle and are superheated by radiating energy …

Sep 21, 2024 · Stars Stars are massive, luminous spheres of gas, mainly composed of hydrogen, with smaller amounts of helium and other elements. The lifespan of a star varies widely, generally ranging …