| A | B |
| astronauts | pilots or members of the crew of a spacecraft |
| capsule | enclosed front section of a rocket |
| hatch | a trapdoor covering the opening in an aircraft's deck |
| horizon | line where the Earth and sky seem to meet |
| lunar | of, like, or about the moon |
| module | self-contained unit or system within a larger system |
| quarantine | isolation to prevent spreading diseases |
| impact | collision |
| sphere | ball or globe |
| narrative nonfiction | a story that recounts true events in chronological order |