Origin of the Moon
نویسندگان
چکیده
منابع مشابه
The Origin of Our Moon
Probably in no branch of the sciences is there such misuse of the term theory as in astronomy. This misuse finds its way into science magazines, TV and radio broadcasts, science news web sites, and even encyclopedias. Many of the conjectures about the solar system's formation are bantered as theories when they really are insufficiently scrutinized hypotheses. I think the Big Bang has adequate e...
متن کاملAmultiple - impact origin for the Moon
The hypothesis of lunar origin by a single giant impact can explain some aspects of the Earth–Moon system. However, it is di cult to reconcile giant-impact models with the compositional similarity of the Earth and Moon without violating angular momentum constraints. Furthermore, successful giant-impact scenarios require very specific conditions such that they have a low probability of occurring...
متن کاملLunar Pyroclastic Deposits and the Origin of the Moon 1
Debate over the origin and evolution of the Moon, and implications relative to the Earth, has remained lively and productive since the last human exploration of that small planet in 1972. More recently, issues related to the evolution of Mars, Venus and Mercury have received increasing attention from the planetary geology community and the public as many robotic missions have augmented the earl...
متن کاملThe Origin and Evolution of the Moon and Planets
The age of the universe, as it is perceived at present, is perhaps as old as 20 aeons so that the formation of the solar system at about 4.5 aeons is a comparatively youthful event in this stupendous extent of time [I]. Thevisible portion of the universe consists principally of about 10" galaxies, which show local marked irregularities in distribution (e.g., Virgo cluster). The expansion rate (...
متن کاملOrigin of the terrestrial planets and the moon.
Our ideas about the origin and evolution of the solar system have advanced significantly as a result of the past 25 years of space exploration. Metal-sulfide-silicate partitioning seems to have been present in the early dust components of the solar nebula, prior to chondrule formation. The inner solar nebula was depleted in volatile elements by early solar activity. The early formation of the g...
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ژورنال
عنوان ژورنال: Nature
سال: 1951
ISSN: 0028-0836,1476-4687
DOI: 10.1038/167029a0