For the first time, astronomers have discovered what could be an exomoon, a moon outside our solar system. The so-called exomoon, which is estimated to be the size of Neptune, was found in orbit ...

A team working with data from the dearly departed Kepler space telescope has reported a possible moon orbiting an exoplanet some 5,000 light years away. It falls somewhere between the size of Earth ...

Some of the same researchers who found the first purported exomoon now say that they’ve found another. Dubbed Kepler 1708 b i, the satellite has a radius about 2.6 times that of Earth, and circles a ...

The find, the second candidate for an exomoon, may be the next big thing in astronomy. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. It's time ...

Our Solar System is full of hundreds of moons, with the outer giant planets having dozens each to their name. But so far, we haven’t convincingly detected a moon orbiting a planet outside the Solar ...

WASP-39b is about the size of Saturn and whips around its sunlike star once every four days; that broiling orbit heats the planet’s dayside to 1,430 degrees Fahrenheit (776 degrees Celsius). WASP-49Ab ...

Team "pro-exomoon" is back to defend the discovery of the first and only exomoons potentially seen by humanity. When you purchase through links on our site, we may earn an affiliate commission. Here’s ...