The location of the solar system's outer boundary is a point of contention among astronomers. There are three possible candidates, which "all have merit." But which one is best?

Twenty years after its discovery, asteroid and quasi-moon 2002 VE 68 has been officially renamed "Zoozve" after a strange label on his 2-year-old child's poster of the Solar System led Radiolab ...

“It’s completely plausible for our solar system to have captured such an Oort cloud planet,” says Nathan Kaib, a co-author on the new work and an astronomer at the Planetary Science Institute.

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

Our solar system may not be as isolated as we once thought. According to a new study, more than 1 million interstellar objects could be lurking in the outer reaches of our cosmic neighborhood ...

The Sun accounts for some 99.86% of the mass in our Solar System; of the remaining fraction of a percent, fully two-thirds is embodied in Jupiter, which itself contains more than 70% of the total ...

NEW YORK (AP) — A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. ... The research was published in the journal Science Advances.

Astronomers posed over the past decade that dark comets, or objects that resemble asteroids but move like comets, may exist. Now, scientists have found a total of 14 of them.

A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. The exoplanet, which is about 120 light years away, appears to take an unusual path ...

WEST LAFAYETTE, Ind. — The organic ingredients to life, hints to where Earth’s water came from, and the fundamental building blocks of our planet and the solar system seem like a lot to fit in 4 ...

The Parker Solar Probe zoomed by the sun on Tuesday during a record-breaking flyby, coming within 3.8 million miles (6.1 million kilometers) of the solar surface during humanity’s closest ...