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Credit: R. Williams (STScI), the Hubble Deep Field Team and NASA
SPACE.com asked scientists, photographers, authors and space leaders for their favorite space photos. This 1995 picture from the Hubble Space Telescope, called the "Hubble Deep Field," was a popular choice. It reveals thousands of distant galaxies by combining light collected over many hours. For the rest of our experts' favorite photos, click through the gallery.