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''The Black Cloud'' is a science fiction novel written by astrophysicist Sir Fred Hoyle. Published in 1957, the book details the arrival of an enormous cloud of gas that enters the solar system and appears about to destroy most of the life on Earth by blocking the Sun's radiation. The cloud is later revealed as a sentient alien gaseous creature. ==Plot summary== In 1964, astrophysicists on Earth become aware of an immense cloud of gas that is heading for the solar system. The cloud, if interposed between the Sun and the Earth, could wipe out most of the life on Earth by blocking solar radiation and ending photosynthesis. A cadre of astronomers and other scientists is drawn together in Nortonstowe, England, to study the cloud and report to the British government about the consequences of its presence. The cloud unexpectedly decelerates as it approaches and comes to rest around the Sun, causing disastrous climatic changes on Earth and immense mortality and suffering for the human race. As the behaviour of the cloud proves to be impossible to predict scientifically, the team at Nortonstowe eventually come to the conclusion that it might be a life-form with a degree of intelligence. The scientists try to communicate with the cloud, and succeed. The cloud is revealed to be a superorganism, many times more intelligent than humans, which is surprised to find intelligent life-forms on a solid planet. When the astronomers ask the cloud how its lifeform originated, it replies that they have always existed. One of the characters suggests this is incompatible with the Big Bang theory. The cloud then learns that another intelligent cloud has stopped communicating and may have mysteriously vanished, not so far away in space in the cloud's terms, so it decides to move on, relieving Earth's suffering. Two of the scientists die in an attempt to learn some of the cloud's vast store of knowledge through visual signals, in order to gain further insights about the Universe. 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「The Black Cloud」の詳細全文を読む スポンサード リンク
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