Webb just spotted a carbon-rich moon factory 625 light-years away, revealing how moons like ours may have first taken shape.

Siraj’s Planet Y search started about a year ago when he was trying to find out whether the shape of the Kuiper Belt is flat. “The planets of the solar system have slight tilts up and down, but ...

Astronomers have long searched for planets like ours, and now, a new discovery brings that dream a little closer to reality.

Researchers are studying eccentric warm Jupiters, giant exoplanets that follow odd, elongated orbits unlike anything in our solar system.

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

Dr. Eric Ford, director of Penn State’s Center for Exoplanets and Habitable Worlds, explains the search for planets beyond our solar system, focusing on those in the “habitable zone” where liquid ...

Exoplanets are planets outside Earth's solar system. In 1995, a gas giant named 51 Pegasi b, which orbits a star similar to Earth's sun, etched its name in history as the first exoplanet ever ...

A recent study by Princeton University astronomers suggests the possible existence of a previously undetected planet in our ...

On August 24, 2006, our solar system lost a planet. It wasn't by cataclysmic destruction, but rather by the vote of the International Astronomical Union, which declared that Pluto, considered the ...

NASA’s James Webb Space Telescope has now captured the first direct look at material within a disk encircling a massive ...

(CNN) — The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper’s authors have ...