By George Musser on July 4, 2016 at Scientific American

PASADENA, Calif.—NASA’s Juno spacecraft has successfully entered orbit around Jupiter. At 8:53 p.m. Pacific time, ground controllers received a telemetry tone of 2327 Hz—equivalent to the highest D note on a piano keyboard—indicating that Juno’s 35-minute engine burn had slowed the spacecraft enough to slip into the giant planet’s gravitational embrace. Launched in 2011 on a nearly five-year interplanetary voyage, Juno is only the second spacecraft to ever orbit Jupiter, after the Galileo mission that explored the giant planet from 1995 to 2003. During its capture into orbit Juno passed just 4,490 kilometers above the Jovian cloudtops, so close that the planet filled half its sky. Even so, Jupiter is so immense that an astronaut riding along would have seen only about five percent of the planet’s cloud-shrouded face…. read more here