Volcanically active exo-moons
While our solar system contains dozens of moons orbiting the planets, there is as yet no clear detection of a moon orbiting an extrasolar planet. A group of astronomers and planetary scientists, led by former UVa graduate student Apurva Oza, have a new paper accepted to the Astrophysical Journal (http://arxiv.org/abs/1908.10732) which shows that these exo-moons may have been hiding in plain sight.