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''How It Ends: From You to the Universe'' is a non-fiction book by astronomer Chris Impey that discusses the science of endings, ranging from personal to cosmic. It was published as a hardcover by W. W. Norton & Company in 2010 and as a paperback in 2011. ==Summary== ''How It Ends'' is a non-fiction book by astronomy professor Chris Impey on endings from the personal to the cosmic. It takes the reader far from the bounds of their brief existence to the eons of space and time during which stars will die and black holes will fizzle away as the universe expands to emptiness. Despite the austere subject matter and the gloomy overall prognosis for the universe, the writing is light and ironic, and enlivened by vignettes of leading researchers. The web site associated with the book has extensive source material on each major scientific topic. The book works outward in scale, starting with human mortality and looking at the rare species that don’t seem to age or suffer from senescence. The fate of species is considered next, along with the possibility that the human species might develop the capability to exempt itself from natural selection. Life on Earth is a vast interconnected web of life called the biosphere and it has proved to be surprisingly resilient over its four billion year history. ''How It Ends'' then moves to external threats to the planet, beginning with the space rocks that are leftover from the formation of the moon and planets in the Solar System, and continuing with the eventual warming and demise of the Sun. Within the Milky Way galaxy, all the lights eventually go out as the lowest mass stars exhaust their nuclear fuel. A trillion years from now, the Milky Way will be a dark agglomeration of stellar husks. The book closes with the likely scenario for a universe governed by dark energy: endless expansion and dissipation of objects bound by gravity as the second law of thermodynamics dictates the outcome. The last topic is the fine tuning of physical laws that makes the universe hospitable for biology, and the multiverse scenario that posits our universe as one among many in a possibly unending progression. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「How It Ends: From You to the Universe」の詳細全文を読む スポンサード リンク
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