A strange, starless cloud on the edge of a nearby galaxy is forcing astronomers to confront one of the biggest unknowns in ...

A newly discovered celestial object may be a starless cloud that could change how astronomers understand dark matter.

A silent traveler has recently made its presence known in the dark velvet of our solar system. This has sparked a debate that ...

The mystery of strangely blinking objects scattered throughout the Milky Way just deepened. Something 15,000 light-years away from the Sun isn't just slowly, methodically beaming out radio waves – ...

Harvard Professor Avi Loeb suggests the interstellar object 3I/ATLAS could be an alien probe. Explore the 'anti-tail' mystery ...

What made the pulses puzzling to the astronomers was that they came in the form of both radio waves and X-rays. The discovery marks the first time that such objects, called long-period transients, ...

It's estimated there may be trillions of rogue planets wandering through the Milky Way, unbound to any star. Since detecting our first ones, we have been presented with an odd mystery.

Roughly a year ago, astronomers announced that they had observed an object that shouldn’t exist. Like a pulsar, it emitted regularly timed bursts of radio emissions. But unlike a pulsar, those bursts ...

ATLANTA (AP) — More than 200 people across a half-dozen southern U.S. states have now reported witnessing a mysterious object streak across the sky on Thursday, but no one is certain exactly what it ...