A chest is a naturally occurring structure that spawns every time a planet is restored. They can contain resources, consumables, and items.

Opening a chest creates a pulse similar to an Ultranova, but does not destroy any player-built structures. For this reason, it can be useful to wait to open the chest until after you're done planting all the plants you want to have on that planet, so that all the thorn plants that might appear can be cleared with the pulse. This is especially useful when setting up a planet as a combat arena.