NASA reveals that its Boeing-747-mounted SOFIA (Stratospheric Observatory for Infrared Astronomy) telescope, during a 2011 flight in which its sensitive infrared sensors were aimed at the center of the Milky Way galaxy, captured an image of the super-massive black hole at the heart of the galaxy. A disc of dust and gas circling the center of the galaxy – seven light years across – lights up the image. The black hole is believed to have a mass of over four million times that of Earth’s sun.
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