Assertion: planet's satellite | /r/HasProperty | discovered
Facets:
value: close to janus
type: TEMPORAL
Source sentences:
text: Close to Janus another satellite was discovered, named Epimetheus.
text: Around 1950, when artificial satellites began to be discussed in earnest, everybody expected them to be just burned-out upper stages of multistage rockets, carrying no radio transmitters but being tracked by radar from the Earth.
text: When natural satellites are first discovered, they are given provisional designations such as "S/2010 J 2" (the 2nd new satellite of Jupiter discovered in 2010) or "S/2003 S 1" (the 1st new satellite of Saturn discovered in 2003).