Paul and Prosper Henry
The brothers Paul-Pierre Henry (born August 21, 1848 in Nancy , † January 4, 1905 in Montrouge ) and Mathieu-Prosper Henry (born December 10, 1849 in Nancy, † July 25, 1903 in Pralognan ) were French opticians and astronomers .
After the death of Jean Chacornac , the two were tasked with completing the star maps. They used photography to make this task easier . They made the necessary instruments, including the large lenses , themselves. The rapid development of astrophotography in the 19th century is largely due to them.
They made numerous telescopes and other astronomical instruments. At the Observatory of Paris , each of the brothers discovered seven asteroids (see the asteroid list ). In November 1885 they discovered for the first time photographed the reflection nebula around the Pleiades .
In honor of the brothers, the 42 km large lunar crater Henry Frères , the Mars crater Henry , as well as the asteroid (1516) Henry .
Web links
- Publications by P. Henry in the Astrophysics Data System
- Obituaries for Prosper Henry in the Astrophysics Data System
- Obituaries for Paul Henry in the Astrophysics Data System
Individual evidence
- ^ Announcement of the death of Paul Henry . In: Astronomical News . tape 167 , p. 223 , bibcode : 1905AN .... 167R.223. .
- ^ Obituary Notices: Associate: - Prosper, Henry . In: Monthly Notices of the Royal Astronomical Society . tape 64 , p. 296 , bibcode : 1904MNRAS..64..296. (English).