Assertion: jovian moon | /r/HasProperty | ganymede
Facets:
Source sentences:
text: Chinese historian Xi Zezong claimed that the earliest record of a Jovian moon (Ganymede or Callisto) was a note by Chinese astronomer Gan De of an observation around 364 BC regarding a "reddish star".
text: Titan's diameter and mass (and thus its density) are similar to those of the Jovian moons Ganymede and Callisto.