Astronomers watched water clouds grow thicker and thinner on a world trillions of miles away. It's familiar weather in a ...

As far-fetched as it may seem, quirks of orbital mechanics could allow hundreds of planets to be packed around a star ...

Scientists believe there are planets outside our solar system where life is even more abundant and sustainable.

Imagine if the planet Jupiter orbited much closer to the Sun. What effect would a so-called hot Jupiter have on our Solar ...

Neither famous number is as simple as it first sounds. The real question is how much uncertainty each one can realistically ...

Our Sun, the ancient, stubborn, and, for most of us, reassuringly eternal star, has been at the heart of the Solar System for ...

(johan63/iStock/Getty Images Plus) Our early Earth was a heavy metal album cover: a molten ball covered in a global lava ...

Approximately 40 to 70 new comets are discovered every year, most of which are found by astronomers actively looking for ...

Earth and Mars may have formed through very different processes, despite developing as neighbors in the early solar system.

The materials that form the building blocks of life on Earth have been found in distant planet-forming discs that are the ...

Concerns about passing 1.5C and ‘global dimming’ are driving attention to the prospect of large-scale interventions in Earth ...

NASA’s Voyager 1 spacecraft has been breaking distance records for decades. Launched almost 50 years ago, it became the ...