Astronomers have found one of the best exomoon candidates based on data collected by the Kepler spacecraft. Now they just need the Hubble observations to check if it exists.
This image from the Cassini spacecraft shows four of Saturn’s moons and the outskirts of the planet’s rings. Saturn’s largest moon, Titan, is in the background. In front of it and above the rings at center is Dione, one of the mid-size moons. The small moon Pandora orbits beyond the rings on the right of the image. Finally, Pan peeks out as a spot in the Encke Gap of the A ring on the left of the image. Credit:NASA / JPL-Caltech / Space Science Institute
Astronomers have found thousands of exoplanets orbiting their host stars. Yet, despite thousands of observations, one type of detection has proven elusive: the signal of an exomoon.