Regarding the Apollo 11 plaque.
I find it really thematically poetic that Kelly brought the plaque that was intended for Apollo 11 into Titan and was a major inspiration for her role in the mission (from her reluctance to partook and during the landing), and at the ending of this season, where she puts it on the surface of Titan, fulfilling its "goal" of being put on the surface of a moon. Not its original destination of being Earth's moon, but rather a moon far beyond what the people of Apollo would dream of. Another thing is the fact that this plaque in this alternate universe went all the way to Titan, one of the moons of Saturn, instead of Earth's moon in our current timeline, because the Soviets landed first and caused the race to continue and created a new course for Earth's history, way different than ours. It's poetic really.