NASA’s Juno spacecraft will arrive at Jupiter, the most massive planet in our Solar System, later today (July 4) to orbit the gas giant for 20 months and collect data on the planetary core, map the magnetic field, and measure the amount of water and ammonia in the Jovian atmosphere. This illustration depicts NASA’s Juno spacecraft at Jupiter, with its solar arrays and main antenna pointed toward the distant Sun and Earth. Image credit: NASA /...
 