On Oct. 9, 1604, sky watchers, including astronomer Johannes Kepler, spotted a 'new star' in the western sky, rivaling the brilliance of nearby planets. 'Kepler's supernova' was the last exploding supernova seen in our Milky Way galaxy. Observers used only their eyes to study it, because the telescope was not yet invented. Now, astronomers have utilized NASA's three Great Observatories to analyze the supernova remnant in infrared, optical and X-ray light.
PHOTO: NASA/ESA/JHU/R.Sankr it & W.Blair
