Assertion: nebula's star | /r/HasProperty | supernova
Facets:
value: undoubtedly
type: DEGREE
Source sentences:
text: The result is surprising because until now, scientists thought that other processes, such as exploding stars (supernovae), were largely responsible for regulating the formation of stars.
text: In 1928, Edwin Hubble proposed associating the cloud to the star of 1054, an idea which remained controversial until the nature of supernovae was understood, and it was Nicholas Mayall who indicated that the star of 1054 was undoubtedly the supernova whose explosion produced the Crab Nebula.