Researchers have spotted the farthest and oldest galaxy ever found, which existed 700 million years after the Big Bang. The galaxy, known as z8_GND_5296, is also very active, forming stars at 100 times the rate of the Milky Way. Astronomers used the Hubble Space Telescope's infrared camera to find the galaxy and confirmed it with the Keck Observatory's light-splitting spectograph. "If you tried to look at these really distant galaxies with a visible light telescope, you would see nothing. Literally, they're invisible. All that visible and optical light has been shifted into the near-infrared," said the study's author Steven Finkelstein of the University of Texas at Austin.

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