Juno Post-Arrival News Conference

A team of scientists has documented atmospheric changes on Io, Jupiter’s volcanically active satellite, as the giant planet casts its shadow over the moon during daily eclipses. Io’s thin atmosphere collapses as the sulfur dioxide gas emitted from volcanoes freezes when shaded by Jupiter. The atmosphere reforms when Io moves out of eclipse and the ice sublimates.

Setting up post at the king of planets, NASA’s Juno spacecraft fired its main engine for 35 minutes Monday, steering into orbit around Jupiter to peer inside the gas giant and give scientists a better idea of how the solar system took shape 4.6 billion years ago.

This image, taken with the Wide Field Planetary Camera 2 on board the NASA/ESA Hubble Space Telescope, shows the globular cluster Terzan 1. Lying around 20,000 light-years from us in the constellation of Scorpius, it is one of about 150 globular clusters belonging to our galaxy, the Milky Way.