A team of astronomers believe they have spotted the first moon outside our solar system. Phys.org reports that the team lead by Dr. David Kipping, assistant professor of astronomy at Columbia ...

"In our solar system, the most massive moon is Ganymede, which is still extremely small compared to what we are inferring here." ...

The discovery of the first potential exomoon has astronomers scratching their heads. It’s the size of Neptune, and its planet is the same size as Jupiter but ten times the mass. It’s also made of gas.

A new study published as a pre-peer-reviewed paper on arXiv and accepted for publication in Astronomy & Astrophysics suggests that a massive gas giant, HD 206893 B, located 133 light-years from Earth, ...

Astronomers around the world continue to spot new planets outside of our Solar System on a regular basis, and some of those worlds look like they just might be good candidates for life, but spotting ...

We have now confirmed the existence of over 4,000 exoplanets, or planets outside our solar system, which are teaching us about how planets and systems form and could even help us locate other ...

Western University astronomers may have spotted six new moons orbiting planets in solar systems far from our own – an otherworldly discovery so rare it must wait on future technologies to confirm.

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 ...

While analyzing data from NASA’s Hubble and Kepler Space Telescopes, astronomers happen upon new exoplanets all the time. But the same can’t be said about exomoons, which are essentially moons ...