Source: https://www.theatlantic.com/science/archive/2018/08/mike-pence-nasa-faith-religion/568255/

«Eventually, even Aldrin had second thoughts about partaking in a Christian tradition on the moon. “Perhaps, if I had it to do over again, I would not choose to celebrate communion,” Aldrin wrote in his 2009 memoir. “Although it was a deeply meaningful experience for me, it was a Christian sacrament, and we had come to the moon in the name of all mankind—be they Christians, Jews, Muslims, animists, agnostics, or atheists.”»