Create a timeline diagram to understand everything important about Hadean Eon. During Hadean time, the solar system formed within a cloud of dust and gas known as the solar nebula, which eventually spawned asteroids, comets, moons, and planets. Astro Geophysicists theorize that about 4.52 billion years ago, the proto-Earth collided with a Mars-sized planet named Theia. The layouts presented by EdrawMax are 100% customizable, and you can edit them as per your requirement. Timelines can use any suitable scale representing time, suiting the subject and data; many use a linear scale, in which a unit of distance is equal to a set amount of time.