Science Fair Project Encyclopedia
Norman Robert Pogson
Norman Robert Pogson (March 23, 1829 – June 23, 1891) was a British astronomer who worked in Oxford and in Madras, India.
In 1856 he formalized the system of stellar magnitudes, by defining magnitudes logarithmically and fixing a difference of five magnitudes as corresponding to a hundred-fold difference in brightness.
A lunar crater is named after him, and so is the asteroid 1830 Pogson .
References
- Magnitudes of Thirty-six of the Minor Planets for the first day of each month of the year 1857, N. Pogson, MNRAS 17 pp 12 1856 in which Pogson first introduced his magnitude system
09-23-2007 01:00:40
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details
The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details