Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations. The observable universe contains an estimated 1022 to 1024 stars. Only about …

May 2, 2025 · 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 …

4 days ago · This article describes the properties and evolution of individual stars. Included in the discussion are the sizes, energetics, temperatures, masses, and chemical compositions of stars.

Stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores.

May 3, 2025 · Along the way, we’ll explore the types of stars that fill our galaxy, their brilliant life cycles, and some astonishing facts that make stars among the most fascinating objects in all of nature.

Historically, the most prominent stars on the celestial sphere were grouped together into constellations and asterisms, and the brightest stars gained proper names.

Nov 20, 2025 · 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.

Sep 21, 2024 · 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 …

6 days ago · Normal stars simply couldn't create such massive black holes quickly enough. Now, using NASA’s James Webb Space Telescope (JWST), an international team of astronomers has found the …

Mar 31, 2025 · This landscape of “mountains” and “valleys” speckled with glittering stars is actually the edge of a nearby, young, star-forming region... Astronomers using NASA’s Hubble Space Telescope …