Since astronomers captured the bright explosion of a star on February 24, 1987, they have been searching for the squashed stellar core that should have been left behind. A new study from two NASA ...

The absence of observed supernovae in the Milky Way for 400 years refers to visual observations within the galaxy itself, excluding events in other galaxies like the Large Magellanic Cloud (LMC).

Data from NuSTAR and Chandra provide evidence for the existence of a structure known as a "pulsar wind nebula" at the center of the Supernova 1987A (SN 1987A). A pulsar wind nebula (shown as an ...