May 5, 2026 · Galaxies consist of stars, planets, and vast clouds of gas and dust, all bound together by gravity. The largest contain trillions of stars and can be more than a million light-years across. The …

This is a list of galaxies that are visible to the naked eye, for at the very least, keen-eyed observers in a very dark-sky environment that is high in altitude, during clear and stable weather.

Explore our cosmic neighborhood in an interactive 3D map featuring the Milky Way, Andromeda, Triangulum, and dozens of nearby dwarf galaxies. Built for curious learners, stargazers, and …

Apr 29, 2026 · A galaxy is any of the systems of stars and interstellar matter that make up the universe. Many such assemblages are so enormous that they contain hundreds of billions of stars. Galaxies …

Feb 5, 2026 · Discover what a galaxy is explained in simple terms, how many galaxies exist, and how the universe size shapes our view of the cosmos—packed with clear, engaging science.

In these news stories, you’ll find out what we’re learning about how galaxies form, evolve, and shape the beloved universe we call home. State-of-the-art simulations shed light on how galaxies die — and …

A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. [1][2] The word is derived from the Greek galaxias (γαλαξίας), meaning 'milky', a reference to …

Armed with our observations and current understanding of galaxy evolution over cosmic time, dark matter, and large-scale structure, we are now prepared to try to answer that question on some of the …

May 2, 2026 · From the core of the misshapen elliptical galaxy, spectacular jets of material have erupted from its active supermassive black hole — known as an active galactic nucleus — sending material …

Galaxies are vast collections of stars, gas, dust, and dark matter bound together by gravity. There are hundreds of billions of galaxies in the universe.