Annotated image of the field around CLASS B1608+656

Most of the in this Hubble are of a huge cluster called B1608+656, which lies about five light-years away. But the field also contains other that are both significantly and far more distant — two gravitational lenses dubbed Fred and Ginger.

These contain enough to visibly distort the light from objects behind them. Fred, also known more prosaically as [FMK2006] ACS J160919+6532, lies near the lens galaxies in CLASS B1608+656, while Ginger ([FMK2006] ACS J160910+6532) is markedly closer to us. Despite their different distances from us, both can be seen near to CLASS B1608+656 in the central of this Hubble image, and are labelled.
Credit:NASA, ESA


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