A new study estimates Mercury's radius may have shrunk by about 3.9 miles (6.3 kilometers) as the planet cooled over billions ...

What might seem like a simple black-and-white picture of some rocks is actually the first photograph ever taken on the ...

NASA‘s Psyche spacecraft has snapped a new set of Mars photos. The probe used the planet’s gravity to pick up speed and tilt ...

A team of Portuguese scientists has found that studying Mars’ clouds could help engineers prepare safer future missions to the planet’s surface, according to a study published in the scientific ...

Astronomers found a helium atmosphere around a rocky exoplanet — a good sign for the search for life outside the solar system ...

A new discovery from Nasa's Juno mission has revealed what lies beneath one of the most extreme environments in the solar ...

Discover more about NASA's Psyche mission and how it recently tested its instruments on the Red Planet.

NASA's Viking 1 mission blazed a crucial trail with its Mars landing on July 20, 1976. Now, half a century later, that trail ...

New research suggests Mars could have enough water under its surface to form a global ocean. On Monday, scientists released their findings, which are based on seismic measurements captured from NASA’s ...

The BepiColombo spacecraft flew past Mercury for the fifth time last week, revealing the planet in mid-infrared light for the first time. The images revealed details of the temperature and composition ...

The discovery boosts the chances of finding extraterrestrial life.

A rocky planet about 49 light-years from Earth appears to have held onto an atmosphere, despite orbiting a red dwarf capable ...