harvard classification การใช้

• The Harvard Classification Scheme, published in the " Harvard Annals " in 1901.
• As a result of the work of the women " Harvard Classification Scheme, which constitutes the basis of the system used today.
• The Harvard classification had been developed by assigning a different letter to each star based on the strength of the hydrogen spectral line, before the relationship between spectra and temperature was known.
• The catalogue and its extensions were the first large-scale attempt to catalogue spectral types of stars, and its construction led to the Harvard classification scheme of stellar spectra which is still used today.
• In 1885, Edward C . Pickering undertook an ambitious program of stellar spectral classification at Harvard College Observatory, in which a team of Harvard Classification Scheme which was accepted for worldwide use in 1922.
• :: : Hello, well the Harvard classification indicates the temperature of the star's atmosphere, so strictly speaking G will stand for a star which has a comparable temperature to the sun.
• Finally, by 1912, Cannon had changed the types B, A, B5A, F2G, etc . to B0, A0, B5, F2, etc . This is essentially the modern form of the Harvard classification system.
• "' Annie Jump Cannon "'( December 11, 1863 & ndash; April 13, 1941 ) was an Harvard Classification Scheme, which was the first serious attempt to organize and classify stars based on their temperatures.
• The fact that the Harvard classification of a star indicated its surface or photospheric temperature ( or more precisely, its effective temperature ) was not fully understood until after its development, though by the time the first Hertzsprung Russell diagram was formulated ( by 1914 ), this was generally suspected to be true.