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Sproul Observatory

Sproul Observatory

Observatory in Pennsylvania, United States (1913–2017).

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Readers go next to

Share of the 72 clicks on its links

  1. William Cameron Sproul

    American politician (1870–1928).

    40%

  2. Peter van de Kamp

    Dutch astronomer (1901–1995).

    18%

  3. Swarthmore, Pennsylvania

    Borough in Pennsylvania, US.

    14%

  4. Swarthmore College

    Private college in Pennsylvania, US.

    14%

Readers come from

Share of the 401 readers arriving from another article

  1. Nancy Grace Roman

    American astronomer (1925–2018).

    80%

  2. Peter van de Kamp

    Dutch astronomer (1901–1995).

    20%