Description: Astrophysicist Dr. Shadia Habbal, researches solar wind and eclipses, and established the solar-terrestrial physics research group at the Smithsonian's Astrophysical Observatory. #Groundbreaker
Description: On January 24, 1925, for the first time in over a century, a total solar eclipse would be visible across the northern part of the United States. How scientists used a dirigible to observe the phenomenon.
Description: In celebration of over a century of volunteer contributions at the Smithsonian, explore the work of some stellar volunteers from our collection.
Description: The term “personal equation” came into use in the 19th century as scientists found that observers have inherent biases: some anticipate events, and some report events after they have occurred. Recognition of the problem led to a spate of personal equation instruments: some measured biases of this sort, and some reduced the effect of personal errors. Most of these
Description: [view:sia_slideshow==75408]Scientific research has been integral to the Smithsonian, from its founding to today. The Smithsonian's founder, Englishman James Smithson, saw in the U.S. (according to his biographer, Heather Ewing) "a place of the future" that could support "science and progress for humanity." He believed that scientists were "citizens of the world" and that the
Description: [caption id="" align="aligncenter" width="430" caption="The Division of Radiation and Organisms Laboratory, located in the basement of the Smithsonian Institution Building, a division of the Smithsonian Astrophysical Observatory dedicated to studying the effects of solar radiation on organisms. Shown here is a vacuum type thermocouples of very high sensitivity, used in