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, 2018, A Precise Measurement Of The Mass Distribution Of The Massive Cluster Lens Emacsj1341.9-2442, 1.0, European Space Agency, https://doi.org/10.5270/esa-urfk596