Launched in 1990, the NASA/ESA Hubble Space Telescope remains the premier UV and visible light telescope in orbit. With well over 1.6 million observations from 10 different scientific instruments, the ESA Hubble Science Archive is a treasure trove of astronomical data to be exploited.
European Space Agency, Howk comma Jay Christopher, 2016, 'Pop III material found 6 Gyr after the Big Bang? COS constraints on the lowest-metallicity gas at z<1', 1.0, European Space Agency, https://doi.org/10.5270/esa-53in8ri