SPACE PHOTOS THIS WEEK: New Planet, Midnight Mars, More

SPACE PHOTOS THIS WEEK: New Planet, Midnight Mars, More
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July 24, 2008—The bright lights of Abell 2218 shine some 2.1 billion light-years from Earth in an image from the Hubble Space Telescope.

The galaxy cluster, which is filled with thousands of individual galaxies, acts like a gravitational telescope—It reveals light of extremely distant galaxies that appear as thin arcs.

The exposed galactic light was emitted when the universe was just 700 million years old by galaxies some 13 billion light-years away.

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—Image by NASA/ESA/Johan Richard (Caltech, USA)
 
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