|
|
 An amazing journey from our moon to the most distant stars, revealing the magic and majesty of our universe. ... |  After developing his Law of Gravitation, Newton came to believe that the Universe was infinite and homogeneous on a large scale. Einstein's original intuition was similar to Newton's in that he thought our Universe was static, infinite, isotropic and homogeneous. The field equations of Einstein's general relativity are solved for this universe. One of the three solutions found, the "infinite closed universe, " traps light within a finite portion ... |  Using the first radio and submillimeter observations of GRB hosts, I show that some are extreme starburst galaxies with the bursts directly associated with the regions of most intense star formation. I suggest, by comparison to other well-studied samples, that GRBs preferentially occur in sub-luminous, low mass galaxies, undergoing the early stages of a starburst process. If confirmed with future observations, this trend will place GRBs in the ... |  We conclude that these sources are 1e6 year-old cooling neutron stars with magnetic fields above 1e13 Gauss. Second, we describe the hollow supernova remnant problem: why many of the supernova remnants in the Galaxy have no indication of central neutron stars. We have undertaken an X-ray census of neutron stars in a volume-limited sample of Galactic supernova remnants, and from it conclude that either many supernovae do not produce neutron stars ... |  1897. Contents: Book I. Introductory: Our Present Observing Power; The Prismatic Camera; The Discovery of Helium; The Discovery of a Terrestrial Source of Helium. Book II. Nebulae and Stars: The Relation of Nebulae to Stars; The Chemistry of the Nebulae; The Nature of Nebulae; Many So-Called Stars are Nebulae; Double Swarms. Book III. New Stars: Eye Observations of New Stars; The Meteoritic Theory of the Origin of Novae; Photographic and Eye ... |  A lucid, wide-ranging graduate textbook on the topical subject of galactic chemical evolution - by a pioneer of the field. ... |  A quantitative account of the science of cosmology, designed for a non-specialist audience. ... |  As late as 1995, the anticipated widespread population of primeval galaxies remained at large, lurking undetected at unknown redshifts, with undiscovered properties. We present results from our efforts to detect and characterize primeval galaxies by their signature high-redshift Lyman-alpha emission lines utilizing two observational techniques: serendipitous slit spectroscopy and narrowband imaging. By pushing these techniques to their utmost ... |  The perfect how-to book for recreational stargazers, this guide is loaded with practical advice to help new observers spend more time exploring the night sky and less time wondering how, when, and what to observe. ... |  By using transparencies to overlay traditional constellation figures onto his photographs of the night sky, renowned astrophotographer Chen has created an exciting and unusual way to link the brightest stars within each constellation. ... |
|
Seite 1 [ 2] [ 3] [ 4] [ 5] [ 6] [ 7] [ 8] [ 9] [ 10] [ >>>]
insgesamt 435 Ergebnisse
|
|
|