Assertion: lagoon nebula | /r/MadeOf | structure
Facets:
value: at its center
type: LOCATION
value: at its centre
type: LOCATION
Source sentences:
text: The Lagoon Nebula also contains at its centre a structure known as the Hourglass Nebula (so named by John Herschel), which should not be confused with the better known Engraved Hourglass Nebula in the constellation of Musca.
text: The Lagoon Nebula contains at its center a structure known as the Hourglass Nebula (so named by John Herschel), which should not be confused with the better known Hourglass Nebula (see above).