Collisions occur when two or more objects come into contact with each other, often resulting in a transfer of energy. This can happen in various contexts, such as in physics, where particles collide in experiments, or in everyday life, like car accidents. The outcome of a collision depends on factors like the speed and mass of the objects involved. In astronomy, collisions can happen between celestial bodies, such as asteroids or comets. These events can lead to significant changes in the orbits of these objects or even create new celestial formations. Understanding collisions helps scientists learn more about the universe and the forces at play.