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 trillions of years, and its properties change as it ages. 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 from several million to several trillion years. Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light. The most prominent stars have been categorised into constellations and asterisms, and many of the brightest stars have proper names. This article describes the properties and evolution of individual stars.
stars of all in the family, Included in the discussion are the sizes, energetics, temperatures, masses, and chemical compositions of stars. How are stars named? And what happens when they die? These star facts explain the science of the night sky. Stars are a fundamental component in the Universe and collectively form star clusters, galaxies and galaxy clusters.
stars of all in the family, Find out more about star names, star clusters to see with the naked eye, how to photograph stars and the science of stardust. Stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores.
