Have a chat with your companions about possible activities. Quinn is required to look for a rinworld rupture. Switch to Quinn and start computer. You can make a number of different scans, however only this one is necessary: Scan Ops - Active Enabled - Deep Scan - Geographical Scan. Take a look at surface searching for any abnormality. Scanning downwards might take quite a lot of time so I'd suggest you start with upward movement. Talk with others and move in towards Tnuctipun ship.