‘Big Question: How can you know if objects in space will collide? As part of exploring the potential for the impact of objects in space, students learn about evidence of collisions in the solar system, the components of the solar system (including the Sun, Earth, Earth’s Moon, other planets and their satellites, comets, and asteroids), the motion of those components, and the existence of other galaxies. Based on this understanding, students determine whether a fictional asteroid will hit Earth.’