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.
HERE TODAY Violent collisions in the early solar system, illustrated here, probably broke apart would-be planets — but diamonds forged in those planets’ cores may have made it to Earth as meteorites.
Mark Garlick/Science Source
UNDER PRESSURE Using lasers, scientists compressed iron to high pressures that are likely found in large, rocky exoplanets’ cores. Here, an image of inside the laser chamber is shown with an artist’s rendering of an exoplanet.