Q&A with Alvaro Gimenez, ESA’s director of science

Europe’s Rosetta spacecraft — six months into its mission at comet 67P/Churyumov-Gerasimenko — made its closest flyby of the comet’s boulder-strewn nucleus Saturday, capturing photos and measurements to help scientists unravel how the duck-shaped body is evolving on its path around the sun.

The launch of NASA’s Perseverance Mars rover has been delayed two days to July 22 after an issue with ground support equipment at the Kennedy Space Center held up encapsulation of the spacecraft inside the payload fairing of its Atlas 5 rocket.

NASA’s Juno spacecraft, making its first scientific run over Jupiter’s poles Aug. 27, captured remarkable images of Jupiter’s atmosphere, showing that the equatorial bands and zones familiar to even amateur astronomers completely disappear at high latitudes.