Io orbits close to Jupiter at an average distance of 262,000 miles (422,000 km), completing its elliptical cycle once every 42.5 hours. Due to the shape of its orbit, the moon's d ...

NASA's Europa Clipper mission has launched to study Jupiter's icy moon Europa, which may harbor a potentially habitable ocean ...

Starliner astronauts got a much longer stay at ISS. SpaceX caught a rocket booster. Here's a look back at the most pivotal ...

The planet named after the king of the gods in Roman mythology is visible all night long right now, rising in the east at ...

While the Cold Moon will illuminate the skies in various parts of the world, there are currently no reports indicating that ...

NASA and ESA’s Hubble Space Telescope has been observing the outer planets through a program called OPAL (Outer Planet ...

The winter stars are like that. They're bright, sparkly and arrive "from a distance" low on the eastern horizon and gradually ...

Clouds produced an incredible lunar halo that was widely seen in the D.C. area Friday night. Depending on cloud cover, there ...

German astronomer Simon Marius is best remembered for his disputes with Galileo Galilei over priority for discovering Jupiter ...

Researchers from the Juno mission have finally solved a mystery that has puzzled scientists for over four decades.

December’s full moon, known as the “Cold Moon,” will reach its peak illumination at 4:02 a.m. EST on Sunday ... Skywatchers ...

The December Cold Moon is due to light up the night skies this week. It will appear largest at 4:01 a.m. ET on Sunday, December 15, and marks the final full moon of the year. The Cold Moon is the name ...