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Discuss the accomplishments of Ejnar Hertzsprung

Discuss the accomplishments of Ejnar Hertzsprung

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  • Ejnar Hertzsprung was a Danish chemist and astronomer.
  • He developed the Hertzsprung-Russell diagram along with Henry Russell.
  • He determined the distances to many Cepheid variable stars by parallax and hence calibrated the relationship between Cepheid period and luminosity.
  • A Cepheid variable is a type of star that pulsates radially,varying in both temperature and diameter and producing changes in brightness in definite pattern.
  • He worked on the classification system (Hertzsprung-Russell diagram) for stars on the basis of :

Spectral type,

   Stage in their development, and

Luminosity.

  • He also discovered two asteroids.
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