Explore the fascinating world of astronomical simulations in this conference talk from the 36th Chaos Communication Congress. Dive into the realm of computational astronomy, learning how modern simulations help create accurate models and images of the Universe. Discover the journey from ancient stargazers to cutting-edge numerical methods, understanding how computational power has revolutionized our ability to study celestial objects and phenomena. Examine three state-of-the-art hydrodynamics programs: PLUTO, FARGO3D, and AREPO, and learn how these open-source tools are used in worldwide research to recreate cosmic events, including planet formation. Gain insights into the rarity of Earth's formation and the importance of simulations in advancing our understanding of the Universe, even without a viable Planet B in sight.