Even tho Poul Anderson probably knew better, in Tau Zero , he uses cosmology as George Gamow wrote about it in 1952 , book,The Creation of the Universe. Orbiting the Yelm was poetic license and I bet Anderson knew it was not viable physics. It is hard to think of a solution to the Leonora Christine's problem by following back to the Big Crunch. The problem Anderson posits is about the most ultra mind bending cliff hanger anyone has ever thought of. One does wonder if there is a solution? Seems the same problem in the modern accelerating universe is even worse!

Even though Poul Anderson probably knew better, in Tau Zero, he uses cosmology as George Gamow wrote about it in 1952 in his book, The Creation of the Universe. Orbiting the Yelm was poetic license and I bet Anderson knew it was not viable physics. It is hard to think of a solution to Leonora Christine's problem by following back to the Big Crunch. The problem Anderson posits is about the most ultra-mindbending cliffhanger anyone has ever thought of. One does wonder if there is a solution? Seems the same problem in the modern accelerating universe is even worse!