Supernovas are some of the most energetic and powerful events in the observable Universe. Briefly outshining entire galaxies, they are…
"The total number of stars in the Universe is larger than all the grains of sand on all the beaches…
A Chandra X-ray Observatory image of the supernova remnant Cassiopeia A. Credit: NASA/CXC Supernova remnant Cassiopeia A (Cas A) has…