TAKE A WHIFF Uranus is a lovely robin’s egg blue in this image taken by the Voyager 2 spacecraft when it flew past in 1986. New measurements of the planet’s chemistry suggests it may smell like eggs, too — that is, really rotten eggs.
SHOWING THEIR YEARS Flat spiral galaxies like NGC 1055 (left) have more ordered and younger stars than blobby, spherical galaxies like IC 2006 (right), a new survey shows.
From left to right: ESO; Hubble/ESA and NASA
MOONSTRUCK Details of Charon, the largest of Pluto’s five moons, were finally seen clearly in 2015 when the New Horizons mission passed within 13,000 kilometers of Pluto’s surface.