Riccardo Giacconi

1931 - 2018

Photo of Riccardo Giacconi

Icon of person Riccardo Giacconi

Riccardo Giacconi ( jə-KOH-nee, Italian: [rikˈkardo dʒakˈkoːni]; October 6, 1931 – December 9, 2018) was an Italian-American Nobel Prize-winning astrophysicist who laid down the foundations of X-ray astronomy. Read more on Wikipedia

Since 2007, the English Wikipedia page of Riccardo Giacconi has received more than 220,957 page views. His biography is available in 75 different languages on Wikipedia (up from 70 in 2019). Riccardo Giacconi is the 50th most popular astronomer (up from 66th in 2019), the 836th most popular biography from Italy (up from 1,036th in 2019) and the 7th most popular Italian Astronomer.

Riccardo Giacconi is most famous for discovering the cosmic microwave background radiation, which is the oldest form of light in the universe.

Memorability Metrics

  • 220k

    Page Views (PV)

  • 64.40

    Historical Popularity Index (HPI)

  • 75

    Languages Editions (L)

  • 11.34

    Effective Languages (L*)

  • 3.73

    Coefficient of Variation (CV)


Among astronomers, Riccardo Giacconi ranks 50 out of 644Before him are Jérôme Lalande, Paolo dal Pozzo Toscanelli, Gerard Kuiper, Ferdinand Verbiest, Vera Rubin, and Clyde Tombaugh. After him are William Lassell, Varāhamihira, Pierre Janssen, Heinrich Louis d'Arrest, William Alfred Fowler, and Max Wolf.

Most Popular Astronomers in Wikipedia

Go to all Rankings


Among people born in 1931, Riccardo Giacconi ranks 38Before him are D. B. Cooper, Martinus J. G. Veltman, Khieu Samphan, Anne Bancroft, Aldo Rossi, and Hiroto Muraoka. After him are Sri Chinmoy, William Shatner, Jim Jones, James Cronin, Nawal El Saadawi, and David Lee. Among people deceased in 2018, Riccardo Giacconi ranks 25Before him are Atal Bihari Vajpayee, Peter Grünberg, Hubert de Givenchy, Billy Graham, Ursula K. Le Guin, and Burt Reynolds. After him are Lys Assia, Arto Paasilinna, Richard E. Taylor, Jens Christian Skou, Arvid Carlsson, and Robert Venturi.

Others Born in 1931

Go to all Rankings

Others Deceased in 2018

Go to all Rankings

In Italy

Among people born in Italy, Riccardo Giacconi ranks 836 out of 5,161Before him are Giacomo Balla (1871), Giovanni Gentile (1875), Gian Galeazzo Visconti (1351), Donatella Versace (1955), Julia (-76), and Galeazzo Maria Sforza (1444). After him are Andrea Pisano (1290), Federico Barocci (1535), Jacobus da Varagine (1228), Amilcare Ponchielli (1834), Pope Leo V (870), and Federico da Montefeltro (1422).


Among astronomers born in Italy, Riccardo Giacconi ranks 7Before him are Galileo Galilei (1564), Giordano Bruno (1548), Giovanni Domenico Cassini (1625), Giuseppe Piazzi (1746), Giovanni Schiaparelli (1835), and Paolo dal Pozzo Toscanelli (1397). After him are Giovanni Battista Riccioli (1598), Girolamo Fracastoro (1476), Angelo Secchi (1818), Annibale de Gasparis (1819), Luigi Ferdinando Marsili (1658), and Margherita Hack (1922).