Mars’ southern hemisphere is unusually hot deep underground

View larger. | Cutaway view of Mars showing the interior of the planet. Researchers have discovered…

Saturn’s south pole decagon confirmed! A mysterious 10-sided figure

NASA/ESA/A. Sánchez-Lavega (Basque Country University) provided this photo of the area around Saturn’s south pole. It…

BepiColombo mission 1 step closer to Mercury today

View larger. | This view of Mercury from the BepiColombo spacecraft came from its 3rd flyby…

Giant mega-Earth is 23 times more massive than Earth

View larger. | Artist’s concept of a giant mega-Earth. The newly discovered mega-Earth GJ 523b is…

Pioneer 11: Watching the Saturn watchers # #

Pioneer 11 captured this image in September, 1979, from a distance of 248,500 miles (400,000 km).…

How do lava-world exoplanets keep their atmospheres?

Artist’s concept from NASA. Lava-world exoplanets like this one might be expected to be airless. But…

Meet a Saturn-sized exoplanet with Earth-like temperatures

Artist’s concept of a gas giant exoplanet orbiting its star. A new study from PennState University…

Huge rift valleys on Venus hint at a still-living planet

View larger/full image. | Some of the huge rift valleys on Venus as seen by NASA’s…

Fastest star in the galaxy could unlock black hole secrets

This video shows the fastest star in the galaxy, S301, as it orbits the supermassive black…

Could there be life in helium atmospheres on exoplanets?

View larger. | Artist’s concept of an exoplanet with a helium-dominated atmosphere. A new study suggests…