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

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 ...

A massive interstellar object passing through our solar system during its formative years likely altered the orbits of planets into trajectories observed today, a new study says. Interactions with ...

These icy bodies contain organic molecules — and don’t fall into any known category of celestial object we’ve seen before.

This illustration shows the paths through our Solar System of the two confirmed interstellar objects, Oumuamua in 2017 (formally known as 1I/2017 U1), discovered in 2017, and the comet 2I/Borisov ...

A study proposes that Alpha Centauri could be contributing a significant number of asteroids to the solar system. Simulations indicate that around 50 objects from the neighboring star system may ...

The detection of a large interstellar object in 2017 named 'Oumuamua was a landmark discovery. Figuring out where the wayward traveler came from, though, is another challenge entirely, especially ...

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 ...

The Oort cloud is traditionally thought of as a vast shell of perhaps trillions of icy objects encasing our solar system, serving as the final boundary between us and the dark reaches of ...

A NASA mission, IMAP, will investigate and map the sun's particles and energy across the entire heliosphere, using a ...

If you look up on a clear night, the brightest and largest object in the sky will probably be the moon. And unless you have a decent telescope, it is the only natural satellite you can see with ...