Assertion: nebula's star | /r/LocatedNear | a cloud of dust and gas
Facets:
value: over 150 light-years
type: TEMPORAL
Source sentences:
text: It is an open cluster of stars surrounded by a cloud of dust and gas over 150 light-years across and located about 6,500 light-years from Earth in the constellation Cassiopeia, near the Heart Nebula (partially seen in the WISE image of Maffei 1 & 2).