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Q&A: Galaxies, Galaxy Clusters, AGN, and Quasars

Q:
When I look at the picture of the Centaurus galaxy cluster at the web site http://chandra.harvard.edu/photo/2002/0146/ which part of the data below the image gives me a rough idea about how far this cluster is from the Earth?

A:
The distance to the Centaurus cluster is about 170 million light years. See more on distance here: http://chandra.harvard.edu/photo/scale_distance.html.

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