Atom & Cosmos

Liquid water possible on Earthlike planet, plus black-hole atoms, Io’s magma ocean and more in this week’s news

Titan’s liquid-water ocean Known for its hydrocarbon lakes and methane-rich atmosphere, Saturn’s moon Titan may contain a water ocean beneath its icy shell, a new study suggests. The moon’s orbit, rotation and related properties can best be explained if Titan isn’t solid throughout but harbors a subsurface ocean of water, researchers from the Royal Observatory of Belgium in Brussels report in an upcoming Astronomy & Astrophysics .