关于这张图
Engineers install a 2-foot-wide reaction wheel onto the main body of NASA's Europa Clipper spacecraft at the agency's Jet Propulsion Laboratory in Southern California. In all, four wheels were integrated onto the spacecraft, which is being assembled for its launch to Jupiter's moon Europa in October 2024. When the spacecraft heads through deep space, slips into orbit around Jupiter, and collects science observations while flying dozens of times by Europa, the wheels rotate the orbiter so that its antennas can communicate with Earth and so its science instruments, including cameras, can stay o…
