In a virtual reality universe, upcoming 'JUICE' mission flies by Jupiter's moon Callisto 

 To test its autonomous software, the JUICE mission team pretended to fly the spacecraft past Jupiter's fourth moon, and passed the exam with flying colors. 

https://cdn.mos.cms.futurecdn.net/Z2dgPBxKkQsd4urw8K7mHn.jpg

https://www.space.com/jupiter-virtual-reality-callisto-flyby-simulation