作者:
约翰·格里宾 出版社:上海科技教育出版社 副标题: 宇宙的生与死 原作名: In Search of the Big Bang: The Life and Death of the Universe 译者:
卢炬甫 出版年: 2024-1 页数: 174 装帧: 平装 ISBN: 9787542881014
We know that the Universe is indeed flat (Ω =1), and that it is composed of 68.3 per cent dark energy, 26.8 per cent cold dark matter, and just 4.9 per cent baryonic matter, the stuff we are made of. The value of the Hubble parameter today is 67.23 km per second per Megeparsec, and the age of the Universe is very close to 13.8 billion years (certainly no less than 13.79 billion years and no more than 13.81 billion years). (查看原文)
...in the early Universe, this particular ‘pressure’ does not involve the massive particles, such as protons, but only the light particles of the relativistic ‘gas’. These include photons, electrons and positrons, and the three types of neutrino and their antineutrino counterparts. (查看原文)
还没人写过短评呢
还没人写过短评呢