Omega: The Last Days of the World by Camille Flammarion (1842 - 1925)

Omega: The Last Days of the World is a science fiction novel published in 1894 by Camille Flammarion. On 25th century Earth, a comet made mostly of Carbonic-Oxide (CO) could possibly collide with the Earth. It is concerned with the philosophy and political consequences of the end of the world. (Summary by Wikipedia)