Publications of the Astronomical Society of the Pacific, Vol. 111, No. 763 (September 1999), pp. 1163-1168 (6 pages) ABSTRACT Trigonometric parallaxes of three planetary nebulae (A21, A29, and He 2‐11 ...
A history is given of the discovery between 1914 and 1935 of stars of intermediate luminosity between giants and dwarfs with spectral types between G0 to K3. The Mount Wilson spectroscopists ...
Tá torthaí a d'fhéadfadh a bheith dorochtana agat á dtaispeáint faoi láthair.
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Aiseolas