Hubble Sees Light Echo from Exploded Star on This Week @NASA – November 11, 2017

Images from our Hubble Space Telescope show a “light echo” from the explosive death of a star some 11.4 million light-years away – still sweeping through interstellar space three years after the explosion. The “echoing” light – which looks like a ripple expanding on a pond -- is caused by light scattering off interstellar dust clouds. It illustrates that space between stars is not a totally empty void. Also, Powering Saturn's Active Ocean Moon, Help Nickname New Horizons’ Next Flyby Target, and NASA Remembers Gemini, Apollo Astronaut Dick Gordon!