This spacecraft was the farthest human-made object from Earth, and it will reach the Oort Cloud, a hypothetical region in ...

Is it an alien spaceship or an ancient comet? That’s the question puzzling UFO enthusiasts, NASA, and the European Space ...

Discovered last month by a telescope in Chile, the comet known as 3I-Atlas is only the third known interstellar object to pass our way.

NASA has its sights set on the outer solar system for signs of extraterrestrial life. From icy moons to distant planets, these regions hold the key to our search for life beyond Earth.

NASA's Hubble Space Telescope got an up-close look at a headline-grabbing object known as 3I/ATLAS that has wandered into Earth's cosmic neighborhood.

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

Earlier this year, astronomers spotted a mysterious interstellar object, dubbed 3I/ATLAS, hurtling through the solar system ...

The Hubble Space Telescope has captured a stunning image of a high-speed comet traveling through our solar system. Scientists ...

NASA’s Hubble Space Telescope has snapped images of a recently discovered interstellar visitor hurtling through our solar system. Traveling at 130,000 mph, 3I/ATLAS is the fastest comet ever observed ...

NASA said the system is thought to be moving at least 1.2 million miler per hour, nearly twice as fast as our solar system.

NASA experts explain why a passing asteroid isn't cause for concern, while revealing how often Earth encounters space rocks ...