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

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the ...

The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Astronomers have discovered a brand new cold "super Jupiter" exoplanet, ...

The unusual system of three “super puff” planets has at least one more planet, revealed by its gravitational tug on other planets An unusual planetary system with three known ultra-low density ...

Scientists are on an exciting quest to find alien life. They are looking for habitable planets, chemical signs of life, and ...