Popular Astronomy, Volume 57Goodsell Observatory of Carleton College, 1949 |
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Page 54
... tion . 1. Concentration to the galactic plane . Of all novae , 67 % occur with 10 ° of the galactic equator and 96 % within 40 ° . This concentra- tion is to be expected since novae are known to be distant objects and will thus tend to ...
... tion . 1. Concentration to the galactic plane . Of all novae , 67 % occur with 10 ° of the galactic equator and 96 % within 40 ° . This concentra- tion is to be expected since novae are known to be distant objects and will thus tend to ...
Page 74
... tion indiscriminately , are sensitive to a large fraction of the optical range of frequency , and use receivers such as the photographic plate which integrate the effects over times the order of hours . In contrast to this the radio ...
... tion indiscriminately , are sensitive to a large fraction of the optical range of frequency , and use receivers such as the photographic plate which integrate the effects over times the order of hours . In contrast to this the radio ...
Page 491
... tion , dependable weather information is necessary in practically every ac- tivity , either profession or hobby , he feels . To predict the weather for the next 12 to 24 hours with the new device , the first step is to note wind direc- tion ...
... tion , dependable weather information is necessary in practically every ac- tivity , either profession or hobby , he feels . To predict the weather for the next 12 to 24 hours with the new device , the first step is to note wind direc- tion ...
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