There are only certain intervals of time when life of any sort is possible in an expanding universe and we can practise astronomy only during that habitable time interval in cosmic history.
John D. BarrowThere was no "before" the beginning of our universe, because once upon a time there was no time.
John D. BarrowIf all the stars and galaxies in the universe today were smoothed out into a uniform sea of atoms, there would only be about one atom in every cubic meter of space.
John D. BarrowOne would normally define a "religion" as a system of ideas that contain statements that cannot be logically or observationally demonstrated... Gรถdels theorem not only demonstrates that meathematics is a religion, but shows that mathematics is the only religion that proves itself to be one!
John D. Barrow