NASA's Chandra X-ray Observatory and the National Radio Astronomy Observatory's Very Large Array have combined to discover the youngest supernova in the Milky Way galaxy.
At only 140 years old the supernova is younger than Cassiopeia A, the last known supernova in our galaxy which occurred around 1680. It had been missed by optical telescopes on Earth because it occurred close to the center of the galaxy and is embedded in a dense field of gas and dust, making it a trillion times fainter according to a NASA statement.