Ganymede
The largest moon in the solar system
Jupiter's giant moon Ganymede is bigger than Mercury and the only moon known to have its own magnetic field. Beneath its icy crust lies a saltwater ocean believed to hold more water than all of Earth's oceans combined.
Image: NASA / Galileo
Vital statistics
Orbits
Jupiter
Diameter
5,268 km
Gravity vs Earth
0.146 g
Orbital period
7.15 Earth days
Ocean depth
~100 km
Did you know
Bigger than the planet Mercury.
Fact 01
Only moon known to have a magnetic field.
Fact 02
ESA's JUICE mission will orbit it from 2034.
Fact 03
Deep dive
Discovery
Discovered by Galileo in 1610.
Notable missions
- • Voyager
- • Galileo
- • Juno
- • JUICE (arriving 2031, orbit 2034)
Research & publications
Jump straight into peer-reviewed papers, preprints and authoritative references for Ganymede.
arXiv (preprints)
Open-access preprints in physics & astrophysics.
NASA ADS
The definitive bibliographic database for astronomy.
Google Scholar
Cross-publisher academic search.
Nature
Peer-reviewed articles in Nature & sister journals.
Wikipedia
Encyclopedic overview & onward references.
Tip: ask the Research AI for a curated reading list → /research
