"Houses the central government for your empire. This is your "flag in the ground" that lets everyone know you've staked your claim to a planet. It provides some basic resources and and storage for those resources both of which increase with the level of this building. The planetary command also provides some critical reports on your planetary activities such as total resource production and total resource storage for the planet it's constructed on." in-game description
The planetary command center is a building that gets created after the successful arrival of a colony ship at an inhabitable body. Its location is always at the center of the planet map 0,0 and cannot be moved. You cannot demolish a PCC because it is a requirement of a having a colony. The PCC's starting level gets set according to your species' growth affinity.
Visiting a healthy PCC reveals the following specific tabs:
The PCC can generate the food type Algae only.
The PCC is also the key requirement for construction of Supply Pods
Playing Tips: While after a time it may not seem worthwhile to upgrade this building due to relatively high costs and long build times it actualy does turn out to be worth while. The extra production this building produces can add additional upgrade ability to a colony that might already be maxed out using regular buildings since it is not level capped as other resource producers are.