Faint Portraits of First Galaxies Shed Light on Cosmic Dawn

[Bok]

For one sleepless week in early September 2009, Garth Illingworth and his team had the early Universe all to themselves. At NASA's request, Illingworth, Rychard Bouwens and Pascal Oesch had just spent the previous week staring into their computer screens at the University of California, Santa Cruz, scanning through hundreds of black-and-white portraits of faint galaxies recorded in a multi-day time exposure by a newly installed infrared camera on the Hubble Space Telescope. NASA simply wanted the three astronomers to preview the images and make sure that the camera was working correctly, before the agency released the data more widely.
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