His paper on Halley's Comet so impressed his superiors that he was offered an assistanceship at the Lilienthal Observatory to the celebrated lunar observer J.H Schroter.
His paper on Halley's Comet so impressed his superiors that he was offered an assistanceship at the Lilienthal Observatory to the celebrated lunar observer J.H Schroter. He was the first to make effective use of the heliometer to measure the apparent diameter of the Sun, and he corrected the measurement errors made by James Bradley in Bradley's catalog of stars. Other accomplishments included noting the double stars for both Procyon and Sirius, and his work on 61 Cygni, which led to his discovery of parallax. FTP, identify this German astronomer also known for his namesake functions.
His paper on Halley's Comet so impressed his superiors that he was offered an assistanceship at the Lilienthal Observatory to the celebrated lunar observer J.H Schroter.
Friedrich Wilhelm {Bessel}