An interstellar visitor is puzzling scientists with its strange colour and rapid brightening, prompting fresh questions about what’s really happening as it travels through our Solar System.

The interstellar comet 3I/ATLAS has a thick irradiated crust that no longer resembles its home star system, simulations and ...

The comet could be older than our solar system. The comet is also distinct because nickel vapor was detected in the gas ...

A BBC article about moon landing conspiracy theories points out that when Armstrong and Aldrin placed the American flag on the moon, their movements caused the flag to ripple. After they stepped away, ...

I/ATLAS is the third interstellar object ever discovered in our solar system. Telescope observations suggest it is a roughly 7-mile-wide (11 kilometers) comet zooming at more than 130,000 mph (210,000 ...

When Comet 3I/ATLAS roared into the solar system this summer, it launched a scientific scramble to study what astronomers ...

A Harvard University professor has said that 3I/ATLAS experienced a sudden "nongravitational" acceleration while passing ...

Manhattan-sized comet 3I/ATLAS allegedly executed an unusual maneuver while approaching the Sun earlier this week, fueling ...

The European Space Agency's ExoMars Trace Gas Orbiter has captured unprecedented close-range data on the interstellar object ...

Here's where Comet 3I/ATLAS, Lemmon and SWAN are in the Halloween sky.

The interstellar object 3I/ATLAS has sparked renewed scientific debate after data from NASA's Jet Propulsion Laboratory ...

JUICE might be bound to Jupiter, but it is fortuitously in place to peek at this object from beyond the stars.