If you think a galaxy is big, compare it to the size of the universe: it's just a tiny dot which, together with a huge number ...

As the universe expands, it feels like it must be spreading out from some initial point. But a physicist explains why that’s ...

It’s hard to fathom the size of the universe. But two Stony Brook University professors are part of a project designed to do just that — an effort scientists say is making advances. Researchers in the ...

In 1925, Edwin Hubble's observation of Cepheid variables in the Andromeda galaxy revolutionized astronomy, proving the ...

Astronomers have discovered what may be the brightest object in the universe, a quasar with a black hole at its heart growing so fast that it swallows the equivalent of a sun a day. The ...