Jupiter's moon Io has active volcanos spewing gases into its thin atmosphere. As Io moves in and out of Jupiter's shadow, its atmosphere collapses and then repairs itself.
Astronomers thought the star AR Scorpii was a lone variable star. Now they realize it's a dwarf star bombarding its companion with relativistic electrons.
New moon is August 2, 2016. The next few evenings are a wonderful time to go out in the country for an edgewise view into our own galaxy, the Milky Way.