Drawing together leading experts from across the field, an international collaboration of cosmologists has created a unified approach for measuring the value of the Hubble constant. Published in ...

In the spring of 1967, a series of unusual sightings began to grip the ...

When a mysterious crescent appeared over Moscow in 1967, alien enthusiasts were unaware they were actually tracking a ...

Astronomers have confirmed the first isolated stellar-mass black hole drifting through the Milky Way, located roughly 5,000 ...

In 1947, pilot Kenneth Arnold reported a sighting of fast-moving objects near Mount Rainier which ignited public fascination ...

Documents might help scientists shed light on unexplained phenomena and government secrets, experts said.

Disclosing government documents about UFOs won't mean much without hard physical evidence for alien spaceships or alien bodies.

JWST observed Uranus for nearly a full rotation, charting the planet's upper atmosphere and magnetic environment for the ...