宇宙是怎么起源的?1948年,俄裔美籍科学家加莫夫提出宇宙大爆炸理论,得到包括霍金在内的许多科学家的认同。他们认为,宇宙的早期是个温度在100亿摄氏度以上、密度极大的火球。大约180亿年前,宇宙突然在10秒～36秒间爆炸。随着温度的急剧下降,宇宙不断地膨胀。当温度和密度降低 How did the universe originate? In 1948, the Russian-American scientist Gamov put forward the theory of the big bang and got the approval of many scientists including Hawking. They think the early universe was a fireball with a density of over 10 billion degrees Celsius. About 18 billion years ago, the universe suddenly exploded in 10 seconds to 36 seconds. The universe is constantly expanding as the temperature drops sharply. When temperature and density decrease