One of the most distant galaxies known, called GN-108036, dates back to 750 million years after the Big Bang that created our universe. The galaxy's light took 12.9 billion years to reach us. GN-108036 was discovered and confirmed using the Subaru telescope and the W.M. Keck Observatory. After the galaxy was discovered, astronomers looked at infrared observations of it taken by NASA's Spitzer and Hubble space telescopes.