If ultimately true, the universe will reach its maximum size around 11 billion years from now. At that point, physics (and ...

On the night of Oct. 5, 1923, Edwin Hubble observed a strange star that flickered in intensity at regular intervals. The star ...

According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

Modern cosmology reveals a universe expanding uniformly without a spatial center or edge. The Big Bang wasn't a localized ...

Astronomers are using radio pulses from space to find missing baryonic matter and learn about supermassive black holes, ...

A backward, mirror universe could explain the existence of dark matter. If an anti-universe exists, it would run backward in time, before the Big Bang. Dark matter, then, could be right-handed ...

Primordial magnetic fields, billions of times weaker than a fridge magnet, may have left lasting imprints on the Universe.

Sometimes, the simplest explanation is the best one," Professor Gupta said. "Maybe the universe’s biggest secrets are just ...

George Smoot, who won a Nobel Prize in Physics for his role in the "discovery of the blackbody form and anisotropy of the ...

This hypothesis is not new. It was given the affectionate nickname of Big Crunch, and says that the accelerated expansion of ...