The apocalyptic history of humanity over the next 500 years was revealed to the author, a long time member of the distinguished Planetary Society, by a mysterious alien messenger sent from the deep future. This thrilling novel of adventure, romance, exploration and existential war is set both on Earth and across the entirety of the Milky Way Galaxy. The novel contains new physics and formulas. It has a dramatic and suspenseful climax with an optimistic ending for the long term future of humanity.