Assertion: planet's history | /r/HasProperty | seen by galileo
Facets:
value: telescopically
type: MANNER
value: in 1610
type: TEMPORAL
Source sentences:
text: History of Telescopic Observation Jupiter's four brightest moons were first seen telescopically by Galileo in 1610; for this reason they are often referred to as the 'Galilean satellites' or simply the 'Galileans'.