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” ...
Add Yahoo as a preferred source to see more of our stories on Google. (Credit: NASA/ESA) It's been 35 years since Hubble came online, so in honor of the intrepid telescope's 35th anniversary, we've ...
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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