Note: Unlocks after completing the quest "Getting to Know the Nexus".
Extra-Planetary Anomaly - Element Zero
Scan the Zheng He system to find this anomaly, which can be scanned for Element Zero.
Scanning the planet will reveal an anomaly, which turns out to be a Starship Wreckage. Search the wreckage to obtain a wide variety of salvage. All in all, you can expect this junk to sell for more than 500 Credits.
Activate your scanner on this planet and follow it to a volcano, which you can can for some XP. Who knew crispy virgins had any experience to impart?