Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

Gaia-4b is the most massive planet known to orbit a low-mass star. Also, see an animation for Gaia-5b, a brown dwarf orbiting ...

Pluto is the tiniest planet in our solar system with a diameter of roughly 2,377 kilometers, making it even smaller than our ...

TOI-6894 b, the largest exoplanet relative to its host star yet seen, doesn’t fit the most widely accepted formation model ...

A team of researchers has outlined how a new "direct fusion drive" propulsion system could allow us to reach Sedna this ...

How many Earth-like exoplanets orbit M dwarf stars (Red dwarf stars), which are smaller and cooler than our Sun? This is what ...

What can Earth-sized exoplanets teach scientists about the formation and evolution of exoplanets throughout the cosmos? This is what a study recently posted to the arXiv preprint server hopes to ...

A rare Jupiter-sized planet AT2021uey b was found 3,200 light-years away using microlensing, a method based on Einstein's ...

In searching for the elusive Planet Nine, researchers instead turned up a different resident in our cosmic backyard.

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

The James Webb Space Telescope (JWST) has discovered that a hazy sky over frozen Pluto is helping to cool the dwarf planet's ...

The James Webb Space Telescope has discovered an exoplanet using the direct-imaging technique. The host star's light was ...