New Theory of Stellar Evolution Collisions occur over time between stellar objects that have intersecting trajectories. Aftermath of the collision results in fragments that fuse into stellar matter clouds. If the localized matter is too small, it dies away as an asteroid. If it is massive enough, eventually enough matter collects into a sphere, thermonuclear fusion begins and the sphere of matter starts to emit visual light. A star has been born. The stars lifespan depends on how long it can sustain its surface temperature. A phase change of the surface of all stars is inevitable. This inevitable change can be proven mathematically thru Newton’s Differential equation. This phase change can be seen in our own star. Sunspots are solidified matter that emits radiation that can only be produced by electrons running across a solid metal material. There has been a positive correlation for an increase of sunspots year over year. The point in which the surface of any star has become completely solidified. The star will cease to emit visual light. A Planet has been born. The center of the new planet will retain a thermonuclear core. This core will remain as long as the pressure density is above critical point for fusion. Once the planet loses enough internal pressure thru earthquakes and volcanoes phase change will occur and it will start to solidify and rest as a planetoid.