"The most recent supernova in our Milky Way galaxy has been located, 140 years after it exploded. NASA's Chandra X-Ray Observatory and ground-based radio dishes discovered the remnants of the supernova, known as G1.9+0.3. When it exploded 140 years ago in the middle of the Milky Way, it couldn't be seen optically because it was obscured by the surrounding dense gas and dust. Today, G1.9+0.3's expanding remnant IS detectable in x-ray and radio waves by Chandra and a ground-based array of dishes. " http://www.nasa.gov/multimedia/podcas...