Not surprising really, it's probably never been observed before: Io's whole shadow transiting across
the large Jovian moon, Ganymede.
Europa's briny ocean may also have an acidity similar to battery acid, rich in the sulfur compounds found on the other
large Jovian moons.
The largest Jovian moons — Io, Europa, Ganymede and Callisto — were first discovered by Galileo in the early 1600s.
Not exact matches
Measurements of
Jovian gravity suggest that Jupiter's core is
large and diffuse, and microwave views show that ammonia wells up to the cloud tops from deep in the atmosphere (SN: 6/24/17, p. 14).
Enceladus is often overshadowed by its
larger distant cousin, Europa, which orbits Jupiter and the
Jovian moon's awesome potential has been widely publicized.