A team of astronomers has taken the sharpest-ever picture of the unexpected interstellar comet 3I/ATLAS using the crisp ...

Scientists estimate the object to be more than 12-miles-wide, speeding at 37 miles-per-second, relative to the sun.

Instead, scientists are looking into existing spacecraft already in orbit around other planets. Harvard Professor Avi Loeb ...

Avi Loeb suggested that NASA may have rushed to conclusions by ruling out the possibility of an artificial aircraft.

The Hubble Space Telescope has captured the best picture yet of a high-speed comet visiting our solar system from another ...

The Hubble Space Telescope has captured the best picture yet of a high-speed comet visiting our solar system from another ...

NASA has set a 2030 deadline to build a 100-kilowatt nuclear reactor on the moon. It’s an ambitious but potentially ...

The Hubble Space Telescope has captured the best picture yet of a high-speed comet visiting our solar system from another star.

Yet NASA - and other experts - do not share his concerns and maintain 3I/ATLAS is simply an interstellar comet, thought to be around 7 miles (11.2 kilometers) wide. The US space agency has been ...

A Harvard astronomer explained why an unidentified object detected this summer could potentially be an alien spacecraft.Avi Loeb, the chair of the university's astronomy department, appeared Thursday ...