WHAT DOES IPOD REVOLUTION MEAN?

At appropriate is a significant-scale image of galaxy M87 taken in 1998 with Hubble's Vast-Subject Planetary Digicam 2. The two photographs at remaining clearly show an image taken in 2006 with Hubble's Sophisticated Digital camera for Surveys. The position from the supermassive black hole is indicated through the black dot from the lessen left pan