Now and then there is a bright radio flash somewhere in the sky. It can last anywhere from a few milliseconds to a few seconds. They appear somewhat at random, and we still aren't sure what they are.

Two new studies have measured the expansion of the universe in our immediate cosmic neighborhood using a novel method that ...

A new set of precision distance measurements made with an international collection of radio telescopes have greatly increased the likelihood that theorists need to revise the “standard model” that ...

Observations show the universe appears flat, yet its true size and global shape beyond the observable horizon may remain forever unknown.

Ripples in the fabric of space-time called gravitational waves may be the key to solving the Hubble tension — one of the biggest nagging problems in physics.

The Universe is big, as Douglas Adams would say. The most distant light we can see is the cosmic microwave background (CMB), which has taken more than 13 billion years to reach us. This marks the edge ...

The team of astronomers used the Keck I telescope to measure the distance to an ancient galaxy described as the farthest galaxy in the universe. The galaxy in question is called GN-z11, and it's both ...

The space between galaxies is not empty. In a new map of the early universe, those “blank” stretches take on a faint, ...