The celestial body's unusual orbit “implies that something extraordinary occurred" in the early days of the solar system—and ...

Analysis of an ancient meteorite suggests that rocky planets both near and distant from the sun may have formed at the same ...

A tiny object far beyond Pluto, newly discovered by the Subaru Telescope, could reshape our understanding of the early Solar ...

Observations of the young HOPS-315 star system show an environment analogous to what our own nascent Solar System would have ...

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

"It is possible that a planet once existed in the solar system but was later ejected, causing the unusual orbits we see today ...

KQ14, nicknamed "Ammonite", was discovered using the Subaru Telescope and is a highly elliptical object with a perihelion and ...

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

Most comets, including the well-known Halley's, loop through our solar system like cosmic time capsules that formed alongside ...

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

Solar System Planets. Astronomy articles on the eight planets, plus the two dwarf planets, Pluto and Eris. Great pictures of everything in the solar system. Updated daily.