Popular Astronomy, Volume 57Goodsell Observatory of Carleton College, 1949 |
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Page 15
... open and coarse . For the sake of completeness the positions of these objects . have been brought forward to 1950 . The last column in the list gives a brief description ... Open cluster 69 18 External Galaxy Messier No. Paul S. Watson 15.
... open and coarse . For the sake of completeness the positions of these objects . have been brought forward to 1950 . The last column in the list gives a brief description ... Open cluster 69 18 External Galaxy Messier No. Paul S. Watson 15.
Page 16
... Open cluster 42 1976 Orion 5 32.5 5 25 Great Nebula ( Dif ) 43 1982 5 32.9 S 5 18 Small Nebula ( Dif ) 44 2632 Cancer 8 37.2 N 20 10 Praesepe ( Op C1 ) 45 - Taurus 3 44.5 N 23 58 46 2437 Puppis 47 2478 7 40.0 S 14 42 Pleiades ( Op Cl ) Open ...
... Open cluster 42 1976 Orion 5 32.5 5 25 Great Nebula ( Dif ) 43 1982 5 32.9 S 5 18 Small Nebula ( Dif ) 44 2632 Cancer 8 37.2 N 20 10 Praesepe ( Op C1 ) 45 - Taurus 3 44.5 N 23 58 46 2437 Puppis 47 2478 7 40.0 S 14 42 Pleiades ( Op Cl ) Open ...
Page 227
... cluster - type variables ( at least many of them ) and the high velocity ... open clusters . In an earlier section the similarity in total brightness of ... open clusters in the Milky Way is now considered 31 A.N. , 270 , 249-275 , 1940 ...
... cluster - type variables ( at least many of them ) and the high velocity ... open clusters . In an earlier section the similarity in total brightness of ... open clusters in the Milky Way is now considered 31 A.N. , 270 , 249-275 , 1940 ...
Contents
INDEX TO ILLUSTRATIONS | 48 |
Astrolabes Photographs of 159 160 | 159 |
e Orbit of 464 | 178 |
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American angle appear asteroid astrolabe Astronomical Society atmosphere atomic average bright brighter California Cepheids cloud color comets crater curves determined diameter distance earth eclipse enstatite Ephemeris fireball galactic galaxy globular clusters Harvard Harvard College Observatory heliometer indicated instrument interest July June Jupiter latitude Lick Observatory light lunar magnitude Mars mass maximum mean measured meridian Messier meteor meteorites Meteoritical Society method miles Milky mirror month moon motion nebulae Notes novae object observations Observatory OCCULTATIONS VISIBLE October Open cluster optical orbit origin Palomar Palomar Observatories paper parallax particles period photographic planetary planetary nebulae planets plates POPULAR ASTRONOMY present probably published radiation radio relative rocket rotation Russell Santa Rosa Saturn scientific solar system space spectra spectrum stellar Struve Sunspot Table telescope temperature theory tion University Uranus Variable Star velocity Venus Yerkes Observatory