Learn what planet rains molten iron and which planet has two moons like Tatooine in Star Wars.

All planets are made of gas, ice, rock and metal, and models of how planets form usually assume that these materials don't ...

New research led by a York University professor sheds light on the earliest days of Earth's formation and potentially calls ...

Elon Musk aims to colonize Mars despite challenges such as its extreme climate, thin atmosphere, and lack of liquid water.

A team of scientists just discovered the longest organic molecules yet seen on Mars, the fourth planet from the Sun and and a ...

Scientists are confident Mars was once abundant with water, as seen in massive flood-carved channels, ancient river valleys, ...

The ancient crater’s discovery in the Pilbara suggests meteorite impacts may have kickstarted Earth's first continents, and ...

NASA's Perseverance rover has encountered another rock on Mars that has left scientists puzzled.

Scientists estimate there are ~1 septillion (1 followed by 24 zeros) planets in the observable universe. This figure is based ...

“There is evidence that liquid water existed in Gale Crater for millions of years and probably much longer, which means there ...