Volume I of a comprehensive three-part guide to celestial objects outside our solar system ranges from Andromeda to Cetus. Features coordinates, classifications, physical descriptions, hundreds of visual aids. 1977 edition.
... planetary nebula NGC 2438, located well within the apparent borders of the cluster, some 7' north of the center. ... C.R.0'Dell (1963) derives a distance of some 3300 light years for the nebula, and an actual diameter of 70,000 AU, ...
The bluish-green tint is due to the strong emission of doubly ionized oxygen (5007 and 4959 angstroms) but color photographs show ... The Skalnate Pleso Catalog (1951) has 1900 light years, L.Kohoutek (1961) obtained 2050 light years, ...
Offers comprehensive coverage of the numerous celestial objects outside our solar system
David Eicher, Comets! Visitors from Deep Space (Cambridge, United Kingdom: Cambridge University Press, 2013), 42. 2. Halley's Comet also sparked the first modern-day comet hysteria as well. Astronomers had just discovered cyanogen—a ...
This guide is divided into two sections. The first, Discovering the Universe,xplains our changing understanding of earth's place in the universe androvides an up-to-the-minute guide to astronomy today.