There are plenty of holes in your argument that make it perfectly possible to have an infinite universe with infinitely fast travel and no alien visitations whatever.
32.
:: Right-so in my description of the cubic parsec, I started out by saying that I was assuming that the hypothetically infinite universe was at least somewhat uniform.
33.
This probably doesn't work in an infinite universe, and besides the " location " of Earth in the present universe would have moved " away " by then.
34.
His lectures at Johns Hopkins would form the nucleus of one of his best known publications, " From the Closed World to the Infinite Universe " ( 1957 ).
35.
If the odds of it happening is non-zero, then in an infinite universe, there are an infinite number of places where it happened-so our unique parsec doesn't stay unique.
36.
Modern cosmogony accepts finitism, in the form of the Big Bang, rather than Steady State theory which allows for an infinite universe, but on physical rather than philosophical grounds.
37.
This age-old human fascination with our place in an infinite universe is the foundation upon which the new $ 76 million, 86, 000-square-foot Chabot Space and Science Center was built.
38.
:The serious contenders are ( 1 ) an infinite universe ( maybe the same as your number 1 ), and ( 2 ) a finite universe without boundary, as Kainaw described.
39.
At least once during the infinite life of an infinite universe, all of the molecules in your rock will spontaneously leap 6 " to the right and not fall as you expected.
40.
:: If the energy density of an infinite universe is zero, the total energy could be any value : see Indeterminate form .-- talk ) 00 : 14, 13 March 2013 ( UTC)