Q&A with Heino Falcke, principal investigator of the Netherlands-China Low-Frequency Explorer (members only)

A modified Russian missile built for nuclear war blasted off on a peaceful mission Friday, targeting placement of a European Earth observation satellite in orbit to measure atmospheric chemistry and global air quality. Liftoff from the Plesetsk Cosmodrome in northern Russia occurred at 0927 GMT (5:27 a.m. EDT).

Chinese officials said the Chang’e 5 mission finished drilling and scooping samples from a lunar lava plain late Wednesday, hours before the spacecraft’s robotic ascender was due to take off from the moon to begin the trip back to Earth.

NASA’s Transiting Exoplanet Survey Satellite, built to find planets around other stars that are close enough for detailed follow-ups by future telescopes, launched Wednesday into a unique high-altitude orbit on top of a SpaceX Falcon 9 rocket from Cape Canaveral.