The chapters on galactic and extragalactic astronomy as well as cosmology were extensively modernized in the previous edition. In this new edition they have been further revised to include more recent results.
This is the fifth edition of the successful undergraduate textbook and reference work. It has been extensively modernized and extended in the parts dealing with extragalactic astronomy and cosmology.
This quantity is used to characterize the light-gathering power of the telescope. If the aperture ratio is large, ... point image of a star, but rather a small disc, since light “bends around the corner”, like all radiation (Fig. 3.6).
The chapters on galactic and extragalactic astronomy as well as cosmology were extensively modernized in the previous edition. In this new edition they have been further revised to include more recent results.
... Norton's 2000.0 , Longman 1989 . Rükl : Atlas of the Moon , Hamlyn 1991 . Ruprecht , Baláz , White : Catalogue of Star Clusters and Associations , Akadémiai Kiadó ( Budapest ) 1981 . Tirion : Sky Atlas 2000.0 , Sky Publishing 1981 ...
... distance. Colour Excess.Another effect caused by the interstellar medium is the reddening of light: blue light is scattered and absorbed more than red. Therefore the colour index B−V increases. The visual magnitude of a star is, from ...