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Astronomy: Digging Deeply Into Galaxies' Pasts

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Science  26 Jan 1996:
Vol. 271, Issue 5248, pp. 450
DOI: 10.1126/science.271.5248.450


San Antonio—By staring for 10 days straight at the same point in the sky, the Hubble Space Telescope has unveiled the faintest galaxies ever seen. They appear to lie at such great distances that astronomers believe they were shining when the universe was a sixth of its present age. Their abundance—the image reveals nearly 2000 of them—implies that large-scale galaxy formation must have taken place at a very early stage of cosmic history.