Our solar system may have hosted up to six giant planets in its first hundred million years, a new study suggests. The ...

The ice giant, now missing, may have disrupted some of the moons of Uranus and Jupiter.

The study, published in Science Advances, focuses on two elements that are essential for life as we know it: nitrogen and ...

Scientists may have found one of the main sources of rocky material for the solar system, forming diverse populations of baby ...

Earth’s earliest chapter is mostly gone. Rocks from the planet’s first few billion years have been eroded, buried, recycled, ...

Unlike rocky planets such as Mars and Earth, angrites do not have a lot of silicon dioxide. Because of this, astronomers have ...

A new study shows chemical compounds for life on Earth likely came from our inner solar system and not a distant comet or meteor and Jupiter played a part.

Billions of years ago, while the solar system was still young, a massive object may have drifted into it. It's not a spaceship, but it is an alien visitor in its own right—a colossal interstellar body ...

It may not feel like it, but everything in the universe is in constant motion. Our Sun, with all its planets, orbits the center of the Milky Way, flying through the cosmos at around 450,000 miles per ...

A new analysis of Apollo samples and Earth rocks suggests that a nearby rocky planet, not a distant object, collided with early Earth and formed the moon. The study argues that this lost planet, Theia ...