Cosmic Forge

Launch and collide bodies to explore the mass sequence from asteroid → planet → star → red giant → black hole. Collisions conserve momentum, while accumulated mass changes each body's appearance and gravitational influence.

Star Forge begins with a collapsing stellar nursery that can grow into a giant and black hole. The model compresses real astrophysical masses and timescales for learning while preserving Newtonian gravity, momentum, and accretion relationships.