In late 2017, a mysterious object tore through our solar system at breakneck speed. Astronomers scrambled to observe the fast ...

Astronomers have confirmed that interstellar objects—cosmic bodies originating from other stars—are passing through our solar ...

A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. Located about ...

A new model has been developed to simulate interstellar activity within our solar system and the nearby Alpha Centauri system ...

A newly discovered comet, called C/2025 F2 (SWAN), may have disintegrated. But the remnants are still visible.

"We're trying to encounter an astronomical object that streaks through our solar system just once and we don’t want to miss ...

The constellation of four satellites can take both narrow- and wide-field images of the Sun to study its corona and solar ...

The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

Pluto isn’t the only dwarf planet in our solar system's outer reaches. Now is an ideal time to look for the egg-shaped Haumea, says Abigail Beall ...

The rotating model, which does not break any known law of physics, suggests the universe could spin around once every 500 billion years. This would be far too slowly to detect easily, but enough to ...

Interstellar objects are among the last unexplored classes of solar system objects, holding tantalizing information about primitive materials from exoplanetary star systems. They pass through our ...