Planet Urantler/Timeline

4.6 billion years ago (4.6 Ga): Urantler's core formed. (It was closer to Sun than today) It was the outermost planet. (even farther than Niptune)                                                                                                                        4.5 billion years ago (4.5 Ga): Urantler grew larger in size collecting gas from the surroundings. 4.1 billion years ago (4.1 Ga): Zoopiter and Baturn fell into orbital resonance. This created a gravitational push which propelled Niptune and Urantler into outer edges of the Zoolar System. Urantler became 7th planet from the Sun. 4 billion years ago (4 Ga): A huge icy body twice the mass of Earth collided with Urantler. The collision abruptly tilted its axis of rotation. Several moons of Urantler were also formed in this process. 600 million years ago (600 Ma): Some of Urantler's moons were crushed by its gravity to form rings around the planet. Today: Urantler is the coldest planet in the Zoolar System. It rotates unusually sideways on its axis. Hundreds of millions of years from now: Some of Urantler's inner moons such as Desdemeowna will collide to form new rings around the planet. 5 billion years from now (+5 Ga): Urantler will become the 5th planet from the Sun when it becomes a red giant.