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Dark matter - Wikipedia, the free encyclopedia Dark matter is a kind of matter hypothesized in astronomy and cosmology to account for gravitational effects that appear to be the result of invisible mass. Dark matter cannot be seen directly with telescopes; evidently it neither emits nor absorbs light
Dark energy - Wikipedia, the free encyclopedia In physical cosmology and astronomy, dark energy is a hypothetical form of energy which permeates all of space and tends to accelerate the expansion of the universe.[1] Dark energy is the most accepted hypothesis to explain the observations since the 1990
Chandra :: Field Guide to X-ray Astronomy :: Dark Matter Mystery The Universe, by Chandra The two largest pieces of the Universe, dark matter and dark energy, are the two that we know the least about, yet nothing less than the ultimate fate of the Universe will be determined by them.
Martin White: Dark Matter - UC Berkeley Astronomy Department Home Aside on flatness Current indications from the cosmic microwave background are that the universe is spatially flat. That implies that the sum of all of the energy (density) in the universe equals the critical density, i.e. the total Omega is 1. This is qu
Dark Matter FIGURE: Superposed on an optical picture of a group of galaxies is an X-ray image taken by ROSAT. The image shows hot gas (which produces X-rays) highlighted in false red color (Ref). The presence of this confined gas indicates that the gravity in groups
Dark Energy - Introduction - Imagine The Universe! Home Page If words seem to be missing from the articles, please read this. Imagine the Universe! is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NAS
暗物質與暗能量----中國科學院高能物理研究所 2003年年底以來，從國內外眾多刊物和媒體評選出的2003年世界十大科技進展新聞看，物質本源及生物起源仍是世界科技關註的重點，入選的多項科技進展都屬於這一領域。其中，"科學家發現暗能量存在的直接證據"這一物質本源研究進展更是受到廣泛關註。
WMAP- Content of the Universe - Wilkinson Microwave Anisotropy Probe (WMAP) Public access site for The Wilkinson Microwave Anisotropy Probe and associated information about cosmology. ... What is the Universe Made Of? The key questions that need to be answered by astrophysicists are: What is really out there? And of what is it al
全新的開始 | Just another WordPress.com site Just another WordPress.com site ... 美國航空暨太空總署在 2003 年 2 月 11 日召開記者會，宣告最新測得的宇宙物質的成分，認為宇宙中只有百分之四是一般物質，百分之二十四是暗物質，百分之七十二是相當奇異的暗能量。
