Here you can see the planets in the system and can check the available natural resources on these planets. In the initial game version, you will be only able to colonize planets with oxygen and water perks, or better to say you will be able to colonize all planets but the pop will only survive on planets with these perks.
Additional features such as technologies enabling the pop to survive on planets without these pers will be added if the game would have some sort of success.
Natural resource deposits are very important because they will directly influence the production efficiency of „first-level materials“ and indirectly all the production of materials upwards in the production chain.
If everything goes well here you will see ships moving in the system and maybe other objects in the system. Furthermore from this view, the colonization will be triggered.