Sentence examples for classification of stellar from inspiring English sources
American astronomer who pioneered in the classification of stellar spectra.
Before his efforts, the classification of stellar spectra was primarily a process of estimation.
Fleming is best known for her work on the classification of stellar spectra the pattern of lines caused by the dispersion of a star's light through a prism placed before a telescope lens.
December 11 , 1863Dover, Delaware April 13 , 1941Cambridge, Massachusetts Annie Jump Cannon, (born December 11 , 1863 Dover, Delaware, U.S. died April 13 , 1941 Cambridge, Massachusetts) American astronomer who specialized in the classification of stellar spectra.
With the discovery of brown dwarfs objects that form like stars but do not shine through thermonuclear fusion the system of stellar classification has been expanded to include spectral types L and T. The spectral sequence O through M represents stars of essentially the same chemical composition but of different temperatures and atmospheric pressures.
In the nineteenth century, before modern systems of stellar classification, Angelo Secchi included Betelgeuse as one of the prototypes for his Class III (orange to red) stars.
Henry Draper Catalogue (HD), listing of the positions, magnitudes, and spectral types of stars in all parts of the sky; with it began the present alphabetical system (see stellar classification) of classifying stars by spectral type.
Wolf 359 has a stellar classification of M6.5, although various sources list a spectral class of M5.5, M6 or M8.
Beta Trianguli Australis is a double star, the primary being a F-type main-sequence star with a stellar classification of F1V, and an apparent magnitude of 2.85.
The spectrum of this star matches a stellar classification of G2 IV, with the luminosity class of 'IV' indicating this is a subgiant star.
In either case, the exterior of IK Pegasi B is covered by an atmosphere of almost pure hydrogen, which gives this star its stellar classification of DA.
