Usually, new moons occur only once a month, but because there’s a slight disjunct between the moon’s phases—a 29.5-day cycle, on average—and the Gregorian calendar, some months can have ...

Logic would suggest the same should be true elsewhere. “Moons are common,” says Jessie Christiansen of the California Institute of Technology. “In our solar system, almost everything has a moon.

Uranus and its five major moons are depicted in this montage of images acquired by the Voyager 2 spacecraft. The moons, from largest to smallest as they appear here, are Ariel, Miranda, Titania ...

Not all blue moons are supermoons, which makes the August 30 full moon even more exceptional. The next time two supermoons will occur in the same month will be January 2037, according to Espenak ...

A new study has concluded that Earth's mini-moons may not have come from the asteroid belt as we once thought, but a source far closer to home. Mini-moons are small asteroids or comets that can ...

These two moons couldn't be more different in terms of appearance. Ariel possesses a bright and young surface with few craters while Umbriel is ancient, and the darkest of Uranus' five large moons.

Jupiter moons Callisto and Ganymede are among the biggest in the solar system, and potential grounds for liquid water and alien life. NASA's JUICE mission will probe them for signs of both.

However, for varying timezones around the world there is no New Moon in February and there are two New Moons in March. So, according to timeanddate.com, there are actually three Black Moons in a row.

A rare celestial alignment in the 2030s will make it possible to send a Uranus Orbiter on an 11-year journey to study the five largest of its 27 moons—all of which may be ocean worlds.

The other three moons orbit in the same direction as Saturn rotates. Sheppard and his team used a telescope in Hawaii to spot Saturn’s 20 new moons over the past few months.

Moons moving out faster? In 2012, French researchers published an analysis of 130,000 data points from 1874 to 2007 showing the position of Saturn’s inner moons.

Saturn's famous rings and some of its icy moons may have formed only about 100 million years ago — after most of the dinosaurs roamed the Earth, a new study suggests.