Akatsuki’s 2-year mission aims to peel away some of the mystery of Venus’s dense, cloudy atmosphere. Mostly carbon dioxide, it includes a 20-kilometer-thick layer of sulfuric acid clouds, and it sweeps over the planet at speeds exceeding 300 kilometers per hour, or 60 times faster than Venus itself rotates. What drives the superrotation “is a fundamental physics question,” says Sanjay Limaye, a planetary scientist at the University of Wisconsin, Madison, and member of the Akatsuki scientific team. To try to answer it, the probe will use a suite of cameras to observe cloud formation and movement as well as heat flux from the planet’s surface to the upper atmosphere. It will also record lightning flashes and send radio signals through the atmosphere to receivers on Earth to probe its temperature and composition.
Office of Strategic Communication