A universe of galaxies

The universe is awash in islands of matter — some 100 billion galaxies make up the basic building blocks of the cosmos.

Welcome to the neighborhood

The Milky Way and Andromeda rule over a motley collection of a few dozen galaxies.

All about our local supercluster

The Virgo Supercluster spans 10 times the diameter of the Local Group, gathering smaller groups and clusters of galaxies together into a galactic megacity.

How to observe galaxies

It’s the most difficult observing you’ll ever do. It’s also the most rewarding.

Galaxies at the edge of the universe

The most distant galaxies are not only some of the most ancient, but also form the scaffolding upon which the entire cosmos is built.

How galaxies interact

Today’s galaxies represent billions of years of mergers — some quiet, others not so much.

Glimpsing the hearts of galaxies

Inside all huge galaxies lies a supermassive black hole. Some are shining brightly, while others are barely visible — but all of them can teach us something about how galaxies evolve.


Sky this Month
StarDome and Path of the Planets

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