An optical image of the galaxy Messier 51 with the insert showing the location of supernova SN2011dh. Using precise radio imaging techniques, astronomers have determined the size of the shock around this supernovae, and estimated its outward velocity. Credit: Rafael Ferrando, Observatory Pla D’arguines Read more at: http://phys.org/news/2015-12-imaging-supernova-shell.html#jCp
Supernovae, the explosive deaths of massive stars, are among the most momentous events in the cosmos because they disburse into space all of the chemical elements that were produced inside their progenitor stars, including the elements essential for making planets and life. Their bright emission also enables them to be used as probes of the very distant universe...
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