搜索结果: 46-60 共查到“天体生物学”相关记录107条 . 查询时间(0.499 秒)
NASA Research Reveals Major Insight Into Evolution Of Life On Earth
Major Insight Earth Evolution Of Life
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2009/8/20
Humans might not be walking on Earth today if not for the ancient fusing of two microscopic, single-celled organisms called prokaryotes, NASA-funded research has found.
Physical mechanisms that shape the morphologies of extragalactic jets
morphologies extragalactic jets
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2009/7/9
Physical mechanisms that shape the morphologies of extragalactic jets。
BVRI surface photometry of mixed morphology pairs of galaxies. III. The third data set
BVRI surface photometry The third data set morphology pairs of galaxies
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2009/6/25
BVRI surface photometry of mixed morphology pairs of galaxies. III. The third data set。
The Use of Line Excitation Mapping to Investigate Planetary Nebula Morphologies
Line Excitation Mapping Investigate Planetary Nebula Morphologies
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2009/6/18
The Use of Line Excitation Mapping to Investigate Planetary Nebula Morphologies。
Scientists Make First Direct Observations of Biological Particles in High-Altitude Clouds（图）
Scientists Direct Observations Biological Particles High-Altitude Clouds
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2009/5/20
A team of atmospheric chemists has moved closer to what's considered the "holy grail" of climate change science: the first-ever direct detections of biological particles within ice clouds.The team, le...
IS THE “STAR TREK”CONCEPT OF ALIENS REALLY NAIVE? -- A COMMENT ON DURIC AND FIELD
Astrobiology-Extraterrestrial intelligence-Radio lines general-Galaxy stellar content
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2009/3/6
Several assumptions used in the recent review paper on the search
for extraterrestrial intelligence (SETI) by Duric and Field (2003) are critically dis-
cussed. New astrobiological results|in partic...
One of the most interesting problems in the nascent discipline
of astrobiology is more than half-century old Fermi's paradox: why, considering
extraordinary young age of Earth and the Solar System i...
ON THE TIMESCALE FORCING IN ASTROBIOLOGY
Astrobiology-Methods numerical-Galaxy evolution-Extraterres-trial intelligence
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2009/2/11
We investigate the e®ects of correlated global regulation mecha-
nisms, especially Galactic gamma-ray bursts (GRBs), on the temporal distribution
of hypothetical inhabited planets, using simple ...
EVIDENCE OF MOLECULAR ADAPTATION TO EXTREME ENVIRONMENTS AND APPLICABILITY TO SPACE ENVIRONMENTS
Astrobiology
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2009/2/9
This is initial investigation of gene signatures responsible for adapt-
ing microscopic life to the extreme Earth environments. We present preliminary
results on identi¯cation of the clusters o...
NEOCATASTROPHISM AND THE MILKY WAY ASTROBIOLOGICAL LANDSCAPE
Astrobiology-methods numerical-Galaxy evolution-extraterres-trial intelligence
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2009/2/9
The number and distribution of habitable planets in the Milky
Way is one of the foremost problems of contemporary astrobiological research. We
investigate the e®ects of applying general neocatas...
研究称近4万颗地外行星可能存在智能生物
外行星 智能生物
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2009/2/7
北京时间2008年2月6日消息，据英国《每日邮报》报道，迄今为止，科学家寻找火星生命的征程仍被打上“失败”烙印，假想中的小绿人根本不见任何踪影。但我们不必为此担心，因为除人类生存的地球外，有近4万颗地外行星可能存在智能生物，并且非常兴旺。
太阳系五大可能孕育生命星球：土卫二最有希望（图）
太阳系 生命 星球
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2009/1/19
北京时间2009年1月16日消息，美国《连线》杂志近日对太阳系内除地球以外，可能孕育生命的五大星球进行了盘点，土卫二、木卫二、火星、土卫六、木卫一均在其中。
NASA：火星发现甲烷或表明其尚存在生命（图）
火星 甲烷 生命
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2009/1/19
北京时间2009年1月16日消息，据英国《太阳报》报道，美国宇航局科学家在15日于华盛顿总部举行的吹风会上，宣布在火星发现甲烷气体，它们可能来自于火星的地质活动或者生命活动。据一些科学家估计，甲烷也可能由火山活动形成。但迄今为止，科学家尚未发现火星上存在任何已知的活火山。更值得关注的是，宇航局在水蒸汽形成的云层所在区域发现了甲烷，水蒸汽是支持生命产生和存在的至关重要的因素。专家们推测，生活在地下冰...
揭秘五大验证地球生命源自外星科学实验（图）
地球生命 外星科学
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2008/12/23
北京时间2008年12月22日消息，据美国《大众机械》杂志报道，多年来，科学家一直在探索地球生命源自外星的可能性。现在，研究人员正通过5个研究项目，对这种设想进行验证。以下就是探讨这种设想的5大研究项目。
《科学》：火星发现大量碳酸盐 或暗示生命迹象（图）
火星 碳酸盐 生命
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2008/12/22
据香港《大公报》援引外电报道，科学家十二月十八日透露在火星上发现了一种名为碳酸盐的矿物，或足以证明火星上曾经有水，甚至有生命。水加二氧化碳，与钙、铁或镁混合起来，就会形成碳酸盐。碳酸盐会在酸中快速溶解，因此，今次在火星上的发现反驳了火星上的水分一度全属酸性的理论。