Friday, October 29, 2010

Spectacular spectroscopist

If you're not running late, detours can be fascinating. How else would I have found out about the astronomer Charlotte Emma Moore Sitterly, who was born near Ercildoun in 1898?
I spotted the historical marker at 640 Buck Run Road in East Fallowfield and stopped to note down her name. When I got home, I did an Internet search and found the following on "Astronomy Abstracts" (http://adsabs.harvard.edu/abs/2010AAS...21520007R.
"Following her graduation from Swarthmore College in 1920, she accepted a position at Princeton University as an assistant to Henry Norris Russell. In 1925 she started a study of the solar spectrum. She could then not know that she would devote much of her scientific career to gathering basic atomic data that are invaluable to the scientific community, even today.
"In 1931 she obtained a PhD degree at U. California, Berkeley, and returned to Princeton as a staff member of the Princeton University Observatory. In 1945 she moved to the National Bureau of Science (NBS), to supervise preparation of the widely used tables of atomic energy levels. Following the successful launching (1946) of a V2 rocket to obtain the ultraviolet spectrum of the sun, Moore started working with Richard Tousey and his group at the Naval Research Laboratory (NRL). Ultimately, they extended the solar spectrum down to 2200 angstroms. She continued her affiliations with NBS and NRL until her death in 1990.
"Charlotte Moore was a rare scientist who devoted her career to obtaining accurate numbers, thus enabling the scientific community to open her tables and know that the data are accurate."
High praise indeed. AND a historical marker to boot!

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