Scientists have been working on ways to find new worlds far from Earth, and this strange method theorized decades ago has ...

Foundation's new planet, Kalgan, will play a critical role in season 3. Here's what we know from the TV show and Isaac Asimov's books, so far.

The James Webb telescope has made another stunning discovery -- this time of a massive planet that could potentially sustain ...

A fascinating glimpse into how a solar system like our own is born has been revealed with the detection of planet-forming ...

A powerful new tool comes online this year that could help astronomers locate the mysterious planet hiding somewhere beyond Neptune altering object orbits. If you get the question in Trivial ...

Instead of a tempest in a teapot, imagine the cosmos in a canister. Scientists have performed experiments using nested, ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in our solar system.

New Horizons spacecraft survives trip 1 billion miles beyond Pluto 02:03. It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

If Planet Nine is out there, this telescope might actually find it A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is ...

The official definition of a “planet” could be set to change again soon. Last time that happened, Pluto was kicked out of the club, but the new proposed definition is designed to be more ...

Astronomers are proposing a new, more quantitative definition of what makes a planet. The new definition looks more directly at the object's mass — but it would still leave Pluto out of the running.