It appears that the the date of the B Cassiopeiae supernova is bad in macOS and also iOS. I don't know if there are other instances of this problem in other descriptions or not.
===== With YYYY/MM/DD formatting:
B Cassiopeiae
B Cassiopeiae is a 19th magnitude Variable Star appearing in the constellation Cassiopeia.
This type SNI: supernova reached magnitude -4.5 on Fri 5874656/12/-2147483648 AD
===== With Mmm DD, YYYY formatting:
B Cassiopeiae
B Cassiopeiae is a 19th magnitude Variable Star appearing in the constellation Cassiopeia.
This type SNI: supernova reached magnitude -4.5 on Fri Dec -2147483648, 5874656 AD