Astronomers have captured the first optical evidence of a million-light-year-long bridge of stars being torn from one massive ...

The rate of human-produced light is increasing in the night sky by as much as 10% per year, making it difficult for astronomers to study the night sky.

Astronomers have spotted two massive galaxies locked in a cosmic tug-of-war 700 million light-years from Earth — and for the ...

Physicists detect antihydrogen-4, the heaviest antimatter nucleus ever created, fueling new theories about dark matter and ...

Bold new theories on "mirror worlds" and how dark matter may have formed - from black hole relics to quantum horizons.

Two fresh ideas are giving scientists new ways to think about how the universe’s hidden mass came to be. Together, they paint ...

We usually think of satellites as small objects orbiting planets or stars. But in the broader universe, galaxies themselves ...

Most of what we know about satellite galaxies comes from studying the Milky Way and other similarly large galaxies. But a new ...

Since its launch in late 2021, the James Webb Space Telescope (JWST) has been glimpsing some of the earliest epochs of cosmic ...

A surprising new paper suggests that the universe's expected lifespan is just 33 billion years, and that the cosmos will ...

Your science textbook likely told you that matter exists in four states. You know them as solid, liquid, gas, and plasma.