KEY INGREDIENTS Phosphorus and glycine, both essential to life, have been found at comet 67P, seen in this March 29 picture from the Rosetta spacecraft.
Rosetta/ESA, MPS, UPD, LAM, IAA, SSO, INTA, UPM, DASP, IDA
TARGET: EUROPA Slamming a spent fuel tank into the surface of Jupiter’s icy moon Europa could vibrate the surface so much that a spacecraft flying by (shown in artist’s illustration) could see the tremors. Scientists might be able to analyze the tremors to gauge the thickness of the ice.
IT’S BAAAACK An alleged supernova — the brightest known — detected in 2015 is back for another round, researchers report. Left and right panels show before and after images from the initial detection.
THE DARK ENERGY SURVEY, B. SHAPPEE AND THE ASAS-SN TEAM