than 2.2 billion light-years away, for more than 13 hours. The gravity of the cluster’s trillion stars, plus dark matter, acts as a 2-million-light-year-wide “lens” in space. This “gravitational lens” ...
The first of a set of unprecedented, super-deep views of the universe from an ambitious collaborative program called The Frontier Fields is being released today at the 223rd meeting of the American ...
The Hubble Space Telescope as seen from the Space Shuttle Discovery in December 1999. Credit: NASA In the summer of 1995, Robert Williams, then director of the Space Telescope Science Institute, which ...
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