《A Short History of Nearly Everything》的笔记-III: A New Age Dawns. 11 Muster Mark's Quarks
- 章节名：III: A New Age Dawns. 11 Muster Mark's Quarks
- 2015-04-03 23:54:51
P210Carl Sagan in Cosmos raise the possibility that if you travelled downwards into an electron, you might find that it contained an universe of its own, recalling all those science-fiction stories of the 1950s. "Within it, organised into the local equivalent of galaxies and smaller structures, are an immense number of other, much tinier elementary particles, which are themselves universes at the next level and so on forever -- and infinite downward regression, universes within universes, endlessly. And upward as well.'P219the upshot of all this is that we live in an universe whose age we can't quite compute, surrounded by stars whose distances from us and each other we don't altogether know, filled with matter we can't identify, operating in conformance with physical laws whose properties we don't truly understand.And on that rather unsettling note, let's return to Planet Earth and consider something that we do understand -- though by now you perhaps won't be surprised to hear that we don't understand it completely and what we do understand we haven't understood for long.
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Only about six thousand stars are visible to the naked eye from earth, and only about two ...
III: A New Age Dawns. 11 Muster Mark's Quarks
P222 For a start, his radical notions questioned the foundations of their discipline, s...
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