The subject matter of this work is an area of Lorentzian geometry which has not been heretofore much investigated: Do there exist Lorentzian manifolds all of whose light-like geodesics are periodic? A
P. de Bernardis, S. Masi , G. Moreno Dipartimento di Fisica, Universita' "La Sapienza" 00184 Roma Italy ABSTRACT. Anisotropy measurement techniques and results are reviewed, with spe
Looks at scientists' efforts to determine whether the universe will continue expanding or stop and begin to collapse upon itself, and discusses the search for the dark or missing matter
Much of the world seems chaotic and unpredictable, but the regular movement of celestial bodies and certain demonstrable physical phenomena seem to indicate the existence of a world that is basically
Measuring the Universe is the first history of the evolution of cosmic dimensions, from the work of Eratosthenes and Aristarchus in the third century B.C. to the efforts of Edmond Halley (1656—1742)."
Communicating his ideas in the form of a classical dialogue between a youth and a wise elder, cosmologist Brian Swimme crafts a fascinating exploration into the creativity suffusing the universe. His
Surveys present knowledge of and research into the sun's galaxy, covering such aspects and components as observational data, neighboring stars, clusters, galactic motion, the nucleus, interstellar gas
Opinions on the large-scale structure of the early universe range widely from primeval chaos to a well-ordered mass distribution. P.J.E. Peebles argues that the evolution proceeded from a nearly unifo
The theoretical physicist shares his latest thoughts on the nature of space and time in this anthology of selections from Princeton University Press. Along with eminent colleagues, Hawking extends the
