A giant exomoon hundreds of times the size of Earth is revealing secrets about how giant planets like Jupiter and Saturn formed. They might also help astronomers find planets where life may thrive.
A moon has been spotted in a star system 4000 light years away – but its structure is confusing.
As the list of known planets beyond our solar system grows, the search for their moons is intensifying. One reason: they might hold the key to finding life elsewhere in the universe.
Given that we are unlikely to be visiting an exoplanet any time soon, astronomers have been contemplating whether it might…