NASA's Juno spacecraft will come closer to Jupiter's moon Io on Dec. 30 than any spacecraft has in 20 years, getting a good look at the solar system's most volcanic body.
NASA's Juno spacecraft will get its closest look yet at Jupiter's moon Io on Dec. 30
Source: space
Source Link: https://www.space.com/nasa-juno-spacecraft-io-moon-closest-flyby-20-years