The existence of massive, elliptical galaxies in the early universe has puzzled astronomers for two decades. An international ...

The vastness of space allows for a huge variety of structures to pop up all over the place. Even things we think of as one-and-done objects—like galaxies—come in quite a few shapes and sizes. Follow ...

Four galaxies crowd the center of a collapsing structure 1.4 billion years after the Big Bang. Each one is churning out stars at a pace that defies comparison with the present-day universe. Around ...

Picture a galaxy, with its shining stars and space dust. What does it look like in your mind? Chances are, it’s a swirling circle of galactic energy. A galaxy is often described as one of a few ...

The universe contains billions of galaxies, each filled with stars, dust and mystery. Here are 12 incredible galaxies, ...

For nearly a century, astronomers have known that the universe is expanding. Most galaxies are carried outward with the flow ...

According to the prevailing “cold dark matter” theory of the evolution of the universe, every galaxy is surrounded by a halo of dark matter that can only be detected indirectly by observing its ...

New radio observations of molecular gas reveal how dozens of galaxies could have rapidly merged together in the early Universe.