Assertion: comet's periodicity | /r/HasProperty | determined
Facets:
value: in 1705
type: TEMPORAL
value: by english astronomer edmond halley
type: OTHER
Source sentences:
text: The comet's periodicity was first determined in 1705 by English astronomer Edmond Halley, after whom it is now named.
text: The comet's periodicity was first determined in 1705 by English astronomer Edmond Halley, after whom it is now named.