Some things, like the orbits of the planets, can be calculated far into the future. But that's atypical. In most contexts, there is a limit. Even the most fine-grained computation can only forecast British weather a few days ahead. There are limits to what can ever be learned about the future, however powerful computers become.
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About Martin Rees
Martin Rees was a contemporary British cosmologist and astrophysicist. Martin John Rees, Baron Rees of Ludlow, is a British cosmologist and astrophysicist. He was the fifteenth Astronomer Royal from 1995 to 2025, Master of Trinity College, Cambridge, from 2004 to 2012, and President of the Royal Society from 2005 to 2010. Read more on Wikipedia →