#Hubble spots remains of a supernova humans saw explode 1700 years ago
“#Hubble spots remains of a supernova humans saw explode 1700 years ago” The opening years of the Fourth Century saw work begin on St. Peter’s Basilica in Rome, and the astronomer Pappus of Alexandria wrote details of his observation of an eclipse of the Sun. In the southern hemisphere, a star was seen erupting within…