Universe Sandbox «Recommended • 2025»

Once your planets are in orbit, you can flesh out their history.

Will it be a stable yellow dwarf like our Sun, or a volatile blue giant ? universe sandbox

Adjust the axial tilt to create extreme seasons or "tidally lock" a planet so one side is always burning and the other is always frozen. 3. Add the Details (Moons, Rings, and Life) Once your planets are in orbit, you can