A post-apocalyptic fiction by the major figure of 19th-century mystical science fiction- Omega begins as 25th century earth discovers the impending collision of a comet: a great green comet made of lethal carbon monoxide. After the comet collides with Earth, the writing becomes more introspective, and takes on a speculative tone. Flammarion's interest in life after death becomes a dominant theme, and we follow as humanity and other animals evolve toward the final end of the solar system. Omega presages much of 20th century science fiction with its combination of current scientific thought and speculations in evolution, a theme that runs from H.G. Wells to 2001: A Space Odyssey to Greg Bear and many other present day science fiction writers. Camille Flammarion (1842-1925) was a famous French astronomer who also became a notable psychical researcher. In 1882 he founded Juvisy Observatory, which he directed for the rest of his life.