Physicists may have a brand-new way to measure the expansion rate of the universe — one of the biggest outstanding mysteries in cosmology — using space-time ripples predicted by Einstein. A new ...

By stopping black holes from fully evaporating, hidden dimensions may solve a cosmological paradox.

Get a first look at the completed observatory.

Astronomers detect the most powerful space laser from colliding galaxies 8 billion light-years away, offering rare insights ...

This is the center of the Heart Nebula or IC-1805 in the center is a cluster of stars known as Melotte 15. It is located in the Perseus Arm of the Galaxy in the constellation Cassiopeia. This is the ...

Wormholes are often imagined as tunnels through space or time — shortcuts across the universe. But this image rests on a misunderstanding of work by physicists Albert Einstein and Nathan Rosen.

The universe may not be empty space at all. It may be a structured medium whose behavior slows everything together—light and ...

NASA Administrator Jared Isaacman has been avoiding questions about severe cuts proposed to the agency’s budget by President ...