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Who is Ejnar Hertzsprung and Henry Russell?
Ejnar Hertzsprung (Danish: [ˈɑjnɐ ˈhɛɐ̯tsˌpʁɔŋ]; 8 October 1873 – 21 October 1967) was a Danish chemist and astronomer born in Copenhagen. In the period 1911–1913, together with Henry Norris Russell, he developed the Hertzsprung–Russell diagram.
Who Is Henry Norris Russell and explain his contribution?
| Henry Norris Russell | |
|---|---|
| Alma mater | Princeton University |
| Known for | Hertzsprung–Russell diagram Russell–Saunders term symbol Vogt–Russell theorem |
| Awards | Gold Medal of the Royal Astronomical Society (1921) Henry Draper Medal (1922) Bruce Medal (1925) Janssen Medal (French Academy of Sciences) (1936) ForMemRS (1937) |
When was Ejnar Hertzsprung born?
October 8, 1873
Ejnar Hertzsprung/Date of birth
Where did Ejnar Hertzsprung attend school?
Hertzsprung graduated from the Polytechnical Institute in Copenhagen in 1898 and spent the next several years as a chemist in St. Petersburg. In 1901 he went to Leipzig to study photochemistry in Wilhelm Ostwald’s laboratory.
Where is Ejnar Hertzsprung from?
Copenhagen, Denmark
Ejnar Hertzsprung/Place of birth
When did Ejnar Hertzsprung discover two stars?
1909
In 1909 Hertzsprung noticed that two other stars, in widely separated regions of the sky, had motions directed toward the same convergent point of the sky as the five bright stars.
What did Henry Russell discover?
American astronomer Henry N. Russell demonstrated how a star’s brightness is related to its spectral type in the so called Hertzsprung–Russell diagram, invented a method to compute the densities of binary stars, and shaped the development of contemporary astronomy by merging astronomy with astrophysics.
Why did Henry Norris Russell reject Cecilia Payne’s thesis?
Payne had a better knowledge of atomic spectra than most astronomers at the time. Payne concluded that, unlike on Earth, hydrogen and helium are the dominant elements of the Sun and stars. Henry Norris Russell strongly opposed this conclusion and convinced her to omit it from her thesis.
What country were Hertzsprung and Russell from?
Of great importance to theories of stellar evolution, it evolved from charts begun in 1911 by the Danish astronomer Ejnar Hertzsprung and independently by the U.S. astronomer Henry Norris Russell.