Is there a massive undiscovered planet on the outer reaches of the solar system? The idea has been around since before the ...

Decades ago, a renegade physicist suggested that gravity isn't so much a force as just a byproduct of the universe's tendency ...

As human missions to Mars approach, the implications of pregnancy in space raise critical questions about conception, ...

A massive doomed exoplanet on a death spiral toward its parent star has three possible catastrophic fates. A massive planet ...

"For the first time, we have identified the earliest moment when planet formation is initiated around a star other than our ...

Black hole and Big Bang singularities break our best theory of gravity. A trilogy of theorems hints that physicists must go ...

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

"We believe that continuing such activities will further expand our horizon in the field of planetary science." ...

A tiny object far beyond Pluto, newly discovered by the Subaru Telescope, could reshape our understanding of the early Solar System. Named 2023 KQ14, this rare “sednoid” follows an unusual orbit that ...

Stars often whip their planets with solar winds and radiation, pull them ever closer with gravity and sear them with heat.