... OH231.8+4.2 was a star much like our Sun that ran out of nuclear fuel to fuse in its core. ... Three thousand light-years away, a dying star throws off shells of glowing gas. ... Spanning over 25,000 light-years, comparable to the distance from the Sun to the center of our own Milky Way galaxy, a cosmic jet seen in X-rays blasts from the center of Centaurus A. Only 10 million light-years away, Centaurus A is a giant elliptical galaxy - the closest active galaxy to Earth. ... Neptune in Infrared . ...