Template:Selected anniversaries/January 11: Difference between revisions

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||1845 – Albert Victor Bäcklund, Swedish mathematician and physicist (d. 1912)
||1845 – Albert Victor Bäcklund, Swedish mathematician and physicist (d. 1912)
||Johannes Franz Hartmann (b. January 11, 1865) was a German physicist and astronomer. In 1904, while studying the spectroscopy of Delta Orionis he noticed that most of the spectrum had a shift, except the calcium lines, which he interpreted as indicating the presence of interstellar medium. Pic.


||1872 – G. W. Pierce, American physicist and academic (d. 1956)
||1872 – G. W. Pierce, American physicist and academic (d. 1956)

Revision as of 20:33, 3 June 2018