The comet should remain viewable through telescopes until September as it approaches the Sun, then emerge again in December on its outbound leg.

Last week the James Webb Space Telescope captured a direct image of what they believe to be a previously unknown exoplanet ...

These things take millions of years to go from one stellar neighborhood to another, so this thing has likely been traveling ...

An object dubbed 3I/ATLAS is only the third interloper from outside the Solar System seen in all of human history.

Astronomers spot a mysterious object from interstellar space. The object, 3I/Atlas, is traveling at 60 km/s. It poses no ...

NASA has discovered an interstellar comet that's wandered into our backyard. The space agency spotted the object with the sky ...

A comet has entered the Solar System from interstellar space and will pass through the inner planets later this year, NASA ...

The newly discovered interstellar visitor is just the third of its kind and fascinates astronomers who hope to learn from it ...

NASA said the comet will make its closest approach to the sun in late October, scooting between the orbits of Mars and Earth -- but closer to the red planet than us at a safe 150 million miles (240 ...

The "new stars" are best seen from the Southern Hemisphere, but people have spotted them from the United States by looking ...

The European Space Agency said Wednesday that scientists have discovered what might be only the third known interstellar ...