Saturn's moon Mimas could have grown a huge underground ocean as its orbital eccentricity decreased to its present value and caused its icy shell to melt and thin. "In our previous work, we found that ...

Gravity and motion make time pass faster on Mars than Earth, reshaping navigation, communication, and future crewed missions.

This artist’s impression shows a Jupiter-like exoplanet that is on its way to becoming a hot Jupiter — a large, Jupiter-like exoplanet that orbits very close to its star. NOIRLab/NSF/AURA/J. da Silva ...

A passing star which blew past our solar system nearly 3 million years ago could have altered the Earth’s orbit, researchers found. The study, published last week in the journal The Astrophysical ...

It was an astronomical stroke of luck: a once-in-a-lifetime encounter between an interplanetary tourist and a spaceship on a ...

Earth’s path around the Sun is not a fixed racetrack but a slowly shifting orbit, and those subtle changes have a long ...

The Paleocene-Eocene Thermal Maximum (PETM), a period of rapid warming 56 million years ago, saw temperatures increase by approximately 5 degrees Celsius over a few thousand years, resulting in ...

Alien planets born in widely separated two-star systems face a grave danger of being booted into interstellar space, a new study suggests. Exoplanets circling a star with a far-flung stellar companion ...

Aspects of an otherwise Earthlike planet's tilt and orbital dynamics can severely affect its potential habitability -- even triggering abrupt 'snowball states' where oceans freeze and surface life is ...