A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

We thought we understood planets, but the planetary disk chemistry of far-away XUE 10 is completely changing our conception ...

From lava worlds to gas giants, NASA says the variety of these worlds is staggering—and that signs of a further 8,000 distant ...

Space scientists look back on three decades of exoplanet discoveries—from rows of massive ‘super-Earths‘ to worlds with ...

Astronomers have spotted a free-floating ‘rogue’ planet, named Cha 1107-7626, that is going through a massive growth spurt, ...

Astronomers have discovered a distant dwarf planet orbiting beyond Neptune — a frozen world so far from the Sun that it ...

European Southern Observatory's Very Large Telescope (VLT) in Chile, with additional data from the James Webb Space Telescope ...

When you look at the solar system, you might notice that the planets' orbits are tilted, and oddities in the protoplanetary ...

U.S. citizen, Army veteran arrested by ICE claps back at DHS ‘debunk’ ...

Data from the James Webb Space Telescope and other observatories suggests a supervolcanic exomoon may lurk around the giant ...

One of the most notable properties of the giant planets in our solar system—Jupiter, Saturn, Uranus and Neptune—are the ...