The Synthesis of "extragalactic"

What does 'extragalactic' mean? Explore the science of everything that exists beyond the Milky Way, from nearby galaxies to distant quasars.

What is a galaxy? Discover these vast cosmic islands of stars, gas, and dark matter held together by gravity. Explore our own Milky Way and beyond.

Discover irregular galaxies, the cosmic mavericks with no defined shape. Learn why these unique structures are vital for understanding star formation.

Discover elliptical galaxies, the smooth, oval-shaped star cities that hold clues to the universe's history and evolution. Learn why they matter.

Explore the cosmic spectacle of colliding galaxies, how they forge new stars, and the fate of our own Milky Way in its eventual merger.

Explore galaxy evolution, the study of how galaxies form and change over billions of years, from early starbursts to the massive structures we see today.

Explore galaxy clusters, the largest gravitationally bound structures in the cosmos, containing thousands of galaxies, hot gas, and mysterious dark matter.

Discover the Active Galactic Nucleus (AGN), a super-luminous region at a galaxy's heart, powered by a feeding supermassive black hole.

Explore dwarf galaxies, the small, dim star systems that are key to understanding dark matter, cosmic evolution, and the formation of larger galaxies.

Explore galaxy clusters, the largest gravitationally bound objects in the universe, and learn how they help us understand dark matter and cosmic evolution.