There's something big missing from our solar system — and that may be a good thing. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Planetary ...

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away. The planet, known as HD 20794d, gets farther out from its star than Mars is from ...

Simulation results show that Mars, despite its similar size to Earth, has a considerable influence on the Milankovitch cycles.

Earth's climate has swung between ice ages and warmer periods for millions of years, driven by subtle changes in our planet's orbit and axial tilt. These variations, known as Milankovitch cycles, ...

New simulations suggest that up to four of the solar system's rocky planets, including Earth and a long-lost world, once orbited in mathematical harmony around the infant sun. When you purchase ...

Mars’s atmosphere may have once been hundreds of times thicker than it is today, acting as a blanket that protected it from frequent asteroids that ravaged other planets. While the sun and most ...

The climate on such a world must be beyond bizarre. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. A super-Earth planet that dips in and out of ...