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

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

New study assesses where light-powered spacecraft propulsion technology currently stands.

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

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

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.

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

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 ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Earth may have been exposed to interstellar clouds which may have ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. To us everything seems normal. Our planet, blue and bursting ...

Our solar system has two ice giants, Uranus and Neptune, but there may have been a third. According to a new study published ...

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 ...