For this week's great-grandparent challenge, I have chosen space travellers. And, yes, I've already posted "Can you help connect a space traveller?", and thank you very much to all of you who have gotten so many of them connected to the main tree. All of these astronauts are connected to the main tree now (thanks to you), but none of them have a full set of great-grandparents listed on WikiTree. In order for us to add a list to the Relationship Finder Quick Links page, each person on it needs to have at least one line going back as far as their great-grandparents (and preferably all eight great-grandparents). (If you're wondering why Neil Armstrong and Gus Grissom aren't on this list, they both already have full sets of great-grandparents listed on WikiTree.)
The task is to seek out, source, and add profiles for as many missing great-grandparents as you can find. As you take on an astronaut, and add a new great-grandparent, please post a message here, so we can keep track of how we're doing.
If you can add sources, photos, or biographies, add siblings, children, aunts, uncles, etc., or improve the profiles of these astronauts or their family members in other ways, so much the better!
If you run across an unsourced profile which is already on WikiTree and add one or more sources to it, you can count that source towards Sourcerers Challenge, if you're taking part in that. (And, if you happen to find an additional connection path for an astronaut whose family you're working on, that makes them all the better as a relationship finder!)