wpo - quasar images - look-back time in billions of years [1]

The remote quasars adjacent were imaged in the autumn of 1998 via a 30cm Meade XL200 with Starlight Xpress MX9 CCD camera. Included are two gravitationally lensed by intervening 'invisible' galaxies which either split the quasar into two i.e. Q0957+561 or like APM08279+5255, receding at 92% velocity of light and some 12 billion light-years away, brightened by a factor x20 to shine like 5 quadrillion suns - truly Lighthouses at the Edge of the Universe.    The 'z' value is a measure of recession of the quasar as deduced from a shift of the spectral lines towards the red are fully explained on the main quasar page.