Armstrong acknowledged Aldrin's completion of the post landing checklist with "Engine arm is off", before responding to Duke with the words, "Houston, Tranquility Base here. The Eagle has landed." Armstrong's unrehearsed  change of call sign from "Eagle" to "Tranquility Base" emphasized to listeners that landing was complete and successful. Duke mispronounced his reply as he expressed the relief at Mission Control: "Roger, Twan— Tranquility, we copy you on the ground. You got a bunch of guys about to turn blue. We're breathing again. Thanks a lot."  
Although the science fiction film Destination Moon is generally described as being based on Heinlein's novel Rocket Ship Galileo , the story in fact bears a much closer resemblance to The Man Who Sold the Moon , whose copyright date shows that it was written in 1949, although it wasn't published until 1951, the year after Destination Moon was released. However, the technology of The Man Who Sold the Moon is very different: its rocket is multi-staged, while Destination Moon uses a single-stage-to-orbit spaceship that takes off and lands vertically, both on Earth and the Moon, which is practically impossible using only chemical fuels. (Dialogue in the film makes it very clear that the spaceship is nuclear powered.)
SEVEN: Continue this process with each bath bomb. Allow the paint to fully dry. The painted moons on top of the bath bombs will transfer mica when touched, so handle carefully. To use, place the bath bombs into a hot bath and enjoy!
NOTE: Because these bath bombs contain quite a bit of dark mica, they may leave behind some color on your tub. Mica clings on to dirt and grime on the tub, so giving your bath a quick wipe down before use will help prevent this. The polysorbate 80 also helps the mica disperse throughout the water rather than pooling on top.