The mysterious interstellar visitor in our Solar System has shifted in a way that has never been seen among comets before.

Data from the James Webb Space Telescope on exoplanet K2-18b has revealed the "strongest hints yet of biological activity ...

I/ATLAS, a mysterious interstellar object racing toward the Sun, is baffling scientists with its speed and origin. Some ...

A low-density, puffy planet orbiting relatively far from a young star in a nearly perpendicular orbit. What's going on?

Scientists like Avi Loeb spotlight anomalies hinting at alien tech as it hurtles past Mars on 3 October. NASA & ESA track ...

Harvard professor Avi Loeb claims 3I/ATLAS could be an alien spacecraft. Arizona State University professor Steven Desch is ...

Humans are finally building the technology that could tell us where to look, when to look, and what signs to watch for. What might we find? Why does it matter?

As strange interstellar objects like 3I/ATLAS approach with mysterious signals, Harvard scientists hypothesise a potential ...

Anyone who studies planetary formation would relish the opportunity to get a close-up look at an interstellar object. Sending ...

Highly anticipated new images of the interstellar comet 3I/ATLAS as it made its nearest pass to the planet Mars last week have been released by the European Space Agency.

The comet is one of only three of its kind recorded in history. But others think there could be more to this celestial object ...

The Habitable Worlds Observatory is poised to tell us whether Earth-like planets are common—if it can get off the ground ...