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FOCUSING COSMIC TELESCOPES: EXPLORING REDSHIFT<i>z</i>∼ 5-6 GALAXIES WITH THE BULLET CLUSTER 1E0657 – 56
The gravitational potential of clusters of galaxies acts as a cosmic telescope allowing us to find and study galaxies at fainter limits than otherwise possible and thus probe closer to the epoch of formation of the first galaxies. We use the Bullet Cluster 1E0657-56 (z = 0.296) as a case …