What Really Happened 13.8 Billion Years Ago?
20.6 هزار بار بازدید -
5 سال پیش
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Did space and time spring
Did space and time spring into existence 13.8 billion years ago in a sudden violent event known as the big bang? In this Frontiers of physics lecture, Dr. Paul Steinhardt explores alternate theories about the evolution and structure of the universe.
Although that has been the prevailing view for the last 50 years, there are good reasons to consider an alternative in which the big bang is replaced by a bounce that smoothly takes the universe from an earlier period of contraction to the current period of expansion.
Perhaps there were many bounces in our past and there will be more in our future. This talk will discuss these two competing scenarios and the very different pictures they present of the evolution and structure of the universe.
Although that has been the prevailing view for the last 50 years, there are good reasons to consider an alternative in which the big bang is replaced by a bounce that smoothly takes the universe from an earlier period of contraction to the current period of expansion.
Perhaps there were many bounces in our past and there will be more in our future. This talk will discuss these two competing scenarios and the very different pictures they present of the evolution and structure of the universe.
5 سال پیش
در تاریخ 1398/02/18 منتشر شده
است.
20,698
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