Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our understanding of how planets take shape — not only in our solar system, but ...

Astronomers first identified these minerals using the now-three-year-old James Webb Space Telescope. To see where exactly the ...

International astronomers have for the first time witnessed the birth of a planetary system beyond Earth's sun that could one ...

The implications were dramatic: with Planet Nine in tow, 2017 OF201 is thrown out of the solar system within 100 million years, an eyeblink on cosmic time. Without Planet Nine, the object’s ...

Voyager 1 took the last picture, affectionately known as the solar system family portrait, on Feb. 14, 1990. While the spacecraft are still functioning today, most of their other instruments have ...

CAPE CANAVERAL, Fla. (AP) — Astronomers have discovered the earliest seeds of rocky planets forming in the gas around a baby sun-like star, providing a precious peek into the dawn of our own solar ...

Rocky bodies called protoplanets were thought to have formed slightly earlier in the inner solar system than those beyond the ...

The Oort Cloud, an expanse of icy bodies in the far reaches of our solar system, is shown here in a scene from "Encounters in the Milky Way," a show at New York City's Hayden Planetarium that ...

Most meteorites, however, originate from the solar system's main asteroid belt—a vast region between the orbits of Mars and Jupiter where more than a million asteroids circle the sun.

Interstellar objects are born outside our solar system and cruise through it without falling into a stable orbit around the sun. 3I/ATLAS and its two predecessors have opened rare, invaluable ...