Down2Earth impact calculator | Teach with space P0#

When the Solar System was very young, about 4 billion years ago, planets were subject to heavy bombardment by asteroids and comets. Scars of these bombardments are the impact craters of different sizes that we can see today on the surface of most rocky planets of our Solar System, including Earth. It is thought that the heavy bombardment of Earth by comets may have contributed to bringing water to our planet – a theory that Rosetta is meant to verify. It is also thought that the collision of a big asteroid with Earth may have wiped away dinosaurs and led to their extinction.