My ago by an object this size. One minute after the impact. This view is based on laboratory experiments and computer simulations of giant impacts. Some debris is being blown out of the atmosphere into space, only to fall back minutes later. One month after the impact.
Earth is covered by a hazy layer of dust blown out by the impact and smoke from forest fires.
This blocked sunlight, killed much plant life and plankton, and disrupted the food chain. One thousand years after the impact. The dust has cleared and a large crater is revealed. The crater form shown here is based on similar size craters discovered on Venus. Dinosaurs and many other species have mostly died out, and species such as small mammals are beginning to fill the empty environmental niche.