Formation and evolution of the Solar System impact event, the Tunguska event, the Chelyabinsk meteor and the impact feature Meteor Crater in Arizona. The process of accretion, therefore, is not complete, and may still pose a threat to life on Earth. Over the course of the Solar System's evolution, comets were ejected out of the inner Solar System by the gravity of the giant planets, and sent thousands of AU outward to form the Oort cloud, a spherical outer swarm of cometary nuclei at the farthest extent of the Sun's gravitational pull. Eventually, after about 800 million years, the gravitational disruption caused by galactic tides, passing stars
Total eclipses on the Moon than on Earth with up to around 2.8 hours. Some total-partial eclipses have a most, half or a part of the Moon being in the center of the Earth's shadow. Unlike the Earth which it umbral shadow shows black, as the Moon has no atmosphere, the surface appears red because the only sunlight available is refracted through the Earth's atmosphere on the edges of the earth as it is shown in the sky in a painting by Lucien Rudaux. Total eclipses on the Moon Total solar eclipses on the Moon are caused when the Earth passes in front of the