Portrait of Friedrich Bessel, German astronomer

Portrait of Friedrich Bessel, German astronomer

H402/0285 Rights Managed

Request low-res file

530 pixels on longest edge, unwatermarked

Request/Download high-res file

Uncompressed file size: 51.0MB

Downloadable file size: 1.8MB

Price image Pricing

Please login to use the price calculator



Caption: Friedrich Bessel. Portrait of Friedrich Wilhelm Bessel (1784-1846), German astronomer. He studied the perturbations of planetary and stellar motions, inventing the Bessel mathematical func- tions to aid his analyses. In 1838 he was the first to establish the distance to a star by measuring its apparent angular motion (parallax), using 61 Cygni as his first object. He predicted that a small companion star formed a binary system with Sirius. He computed the mass of Jupiter by analysing the orbits of its satellites, and found that it had a relatively low density. He suggested the existence of the planet beyond Uranus, but died a few months before the discovery of Neptune.

Release details: Model release not available. Property release not required.

Keywords: astronomer, bessel, bessel functions, discoverer, friedrich wilhelm, inventor, jupiter, mass, mathematician, neptune, parallax, pioneer, portraits, proposer, star distance, surname b

Licence fees: A licence fee will be charged for any media (low or high resolution) used in your project.