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Opinion
Celebrating The Dark Universe
![<p>This image combines visible light exposures of galaxy cluster Abell 2744 taken by the NASA/ESA Hubble Space Telescope and the European Southern Observatory's Very Large Telescope, with X-ray data from NASA's Chandra X-ray Observatory and a <a href="http://www.eso.org/public/images/eso1120a/">mathematical reconstruction of the location of dark matter</a>.</p> (ESO, NASA, ESA, CXC)](https://media.npr.org/assets/img/2011/10/05/eso1120a-abell-2744_custom-2bdaa96ed3519f854fb67c45d40bc68ec9698b63.jpg?s=1000)
This image combines visible light exposures of galaxy cluster Abell 2744 taken by the NASA/ESA Hubble Space Telescope and the European Southern Observatory's Very Large Telescope, with X-ray data from NASA's Chandra X-ray Observatory and a mathematical reconstruction of the location of dark matter.
(ESO, NASA, ESA, CXC)