搜索结果: 136-142 共查到“天文学 the universe”相关记录142条 . 查询时间(0.078 秒)
Cosmological Models of Universe with Variable Deceleration Parameter in Lyra's Manifold
Cosmology FRW universe Lyra geometry
2010/10/13
FRW models of the universe have been studied in the cosmological theory based on Lyra’s manifold. A new class of exact solutions has been obtained by considering a time dependent displacement field fo...
Gravitational Clustering of Galaxies in an Expanding Universe
Gravitational clustering—thermodynamics—correlation function structure of universe
2010/9/16
We inquire the phenomena of clustering of galaxies in an expanding universe from a theoretical point of view on the basis of thermodynamics and correlation functions. The partial differential equation...
Statement by Baruch S. Blumberg at the Opening of the Carl Sagan Center for the Study of Life in the Universe（图）
Astrobiology physics chemistry paleontology
2006/12/8
November 30, 2006，Astrobiology is an exciting new scientific program and discipline that has been initially funded and encouraged by NASA. Today, we celebrate the formation of the Carl Sagan Center fo...
A Note on Cosmological Parameters and the Topology of the Universe
Cosmological Parameters the Topology of the Universe
2010/10/15
Given the wealth of increasingly accurate cosmological observations, especially the recent results from the WMAP, and the development of methods and strategies in the search for cosmic topology, it is...
We discuss G¨odel’s universe in the context of the induced-matter theory. We show that the problem of generating G¨odel’s metric from an extra dimension is equivalent to finding an embedding of G¨odel...
Dark Energy in the Universe, the Irreversibility of Time and Neutrinos
Dark Energy the Universe Time and Neutrinos
2010/10/13
In this review, I discuss briefly how the presence of a cosmological constant in the Universe may imply a decoherent evolution of quantum matter in it, and as a consequence a fundamental irreversibili...
Irreversible Processes and the Accelerated-Decelerated Phases of the Universe
Irreversible Processes the Accelerated-Decelerated Phases the Universe
2010/10/26
A model for the Universe is proposed where it is considered as a mixture of scalar and matter fields. The particle production is due to an irreversible transfer of energy from the gravitational field ...