I have been 'rock ratting' during the expedition, visiting most of the landable planets in the systems where we have had waypoints. Mostly this has been disappointing - no polonium anywhere. Until a couple of hours ago, I would have had to add Yttrium to that list. But I have now found a planet (Jellyfish sector DL-Y D50 8 D) which has Yttrium (it also has Cadmium, Molybdenum, Chromium, Germanium & Zinc). I have now found 5 Yttrium on this planet, all from metallic meteorites (one even had two lumps). If anyone is looking for anything specific, I can tell them whether I have found it in this system.