Encouraged by recent discovery, researchers believe there are likely to be more moons in distant worlds.
Researchers think the celestial body they have now found could be a massive moon orbiting a planet outside the solar system.
Another candidate for exomoon was found four years ago, but that discovery is still awaiting confirmation.
Encouraged by the recent discovery, researchers believe there are likely to be more moons in distant worlds, which could be similar to our moon.
Both the moon candidates are located far from their host star, which means they are less likely to be pulled out of their respective orbits