Huge ring-like structure on the surface of Jupiter’s moon Ganymede may have been caused by a violent impact | Research at Kobe
https://www.kobe-u.ac.jp/research_at_kobe_en/NEWS/news/2020_08_05_01.html
Jupiter Icy Moons Explorer - Wikipedia
https://en.wikipedia.org/wiki/Jupiter_Icy_Moons_Explorer