Peter van de Kamp

Piet van de Kamp, known as Peter van de Kamp in the United States, was a Dutch astronomer who lived in the United States most of his life. He was professor of astronomy at Swarthmore College and director of the college's Sproul Observatory from 1937 until 1972. He specialized in astrometry, studying parallax and proper motions of stars. He came to public attention in the 1960s when he announced that Barnard's star had a planetary system based on observed "wobbles" in of its motion, but this is now known to be false. On November 14, 2018 the Red Dots project announced that Barnard's star hosts an exoplanet at least 3.2 times as massive as Earth.