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In Part I of this article we learnt that there are compelling evidences from dynamics of spiral galaxies, like our own, that
there must be non-luminous matter in them. In this second part we will see that even clusters of galaxies must harbour dark
matter. As if this was not enough, it turns out that if our knowledge of the universe is not completely wrong, then the universe
as a whole has to contain dark matter and that it must be of some exotic type. 相似文献
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In Part I1 of this article we learnt that there are compelling evidences from dynamics of spiral galaxies, like our own, that there must be non-luminous matter in them. In this second part we will see that even clusters of galaxies must harbour dark matter. As if this was not enough, it turns out that if our knowledge of the universe is not completely wrong, then the universe as a whole has to contain dark matter and that it must be of some exotic type. 相似文献
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The study of gas clouds orbiting in the outer regions of spiral galaxies has revealed that their gravitational attraction is much larger than the stars alone can provide. Over the last twenty years, astronomers have been forced to postulate the presence of large quantities of ‘dark matter’ to explain their observations. They are still in the ‘dark’ as to its true nature. 相似文献
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