Riccardo Giacconi (1931–2018)

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Science  25 Jan 2019:
Vol. 363, Issue 6425, pp. 349
DOI: 10.1126/science.aaw5309

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Riccardo Giacconi, one of the most charismatic and influential figures of astrophysics in the modern era, died on 9 December 2018. He was 87. Giacconi was a co-recipient of the 2002 Nobel Prize in Physics for “pioneering contributions to astrophysics, which have led to the discovery of cosmic x-ray sources.” His contributions to astronomy, however, span the entire electromagnetic spectrum, as he directed the development and operation of major space- and ground-based facilities, which have greatly expanded our scientific boundaries over the past 50 years.