Long before 3I/ATLAS slipped through the inner solar system, its water had already recorded the kind of place it came from.

NASA is preparing to launch a mission designed to provide a unique, inside-out view of the ring current. Called STORIE (Storm ...

The presence of deuterium, an isotope of hydrogen, in 3I/ATLAS suggests the interstellar comet formed in a much colder place ...

Uranus’s outermost two rings are surprisingly dissimilar, which opens up a mystery about the tiny moons and moonlets that ...

These targets will guide observations with current and future facilities, including the James Webb Space Telescope and ...

Planetarium will offer tours of the solar system during a special two-part series next month, school officials announced Tuesday. The live-hosted, on-campus shows on Friday evenings and Sunday ...

"Once you get past the danger zone, planets can form quickly and in large numbers." When you purchase through links on our ...

Scientists find Earth formed mainly from inner Solar System material, with little input from outer regions, based on new ...

The head of NASA says maybe Pluto is a planet after all. He is wrong because Pluto is part of the rest of the solar system ...

Astronomers are rethinking the solar system’s formation, with new research indicating Jupiter and Saturn formed millions of years before the inner planets. This sequence, shaped by the ice line and ...

Scientists have seemingly settled long-standing arguments about whether the components of Earth originated from the inner or ...

We’re in one of the most concentrated periods of planetary change in modern history. The closest parallels are periods of ...