Observatory goes online later this decade, it will create one of science's biggest data challenges. The SKA Observatory is a global radio telescope project built in the Southern Hemisphere. There, ...

How is the total mass of the universe calculated? Bob GiddingsGreen Bay, Wisconsin Calculating the total mass of the universe is not simple, because most of the mass is invisible. In a pie chart of ...

Mathematical quirks of our universe have led some cosmologists wonder whether the cosmos was actually born in a black hole.

The first-ever detection of gravitational waves was made 10 years ago today (Sept. 14). In celebration, Space.com takes you ...

Is time something that flows — or just an illusion? Exploring space-time as either a fixed “block universe” or a dynamic fabric reveals deeper mysteries about existence, change, and the very nature of ...

On September 14, 2015, a signal arrived on Earth, carrying information about a pair of remote black holes that had spiraled ...

After years of faulting the president for an “assault … on our democracy,” Rep. Nancy Pelosi (D-Calif.) was singing a wholly different tune regarding rhetoric and the […] ...

The aliens just touched down on Earth, and you've been tasked with showing them one of these three one-hit wonders; which one will you choose?

A recently discovered black hole merger is proving correct theoretical predictions made by Albert Einstein and Stephen ...

Gravitational-wave astronomy has exploded since 2015, capturing hundreds of black hole and neutron star collisions. With ever ...

Astronomers detected in unprecedented detail a collision between two black holes. Their observations confirm predictions made ...

Einstein’s theory of special relativity tells us that for a moving object, time passes more slowly than for a stationary ...