Chapter 1 of 10

Two Halves, One One-Way Ticket

Undocking from Command Module Columbia in lunar orbit (GET 100:12:00)

Told in Eagle’s imagined voice · the events are real · source

AS11-40-5927 (20 July 1969) --- Astronaut Edwin E.
EagleOne Hundred Hours into the flight, twenty-eight latches snapped open—and I floated free in the dark above the Moon.
NASA
01Inside my cramped aluminum cabin, Neil Armstrong and Buzz Aldrin stood strapped to the floor like trolley drivers. Sixty-nine miles above the gray craters, we had just let go of our only ride home: Command Module Columbia.
I spun slowly in front of Columbia's window so Michael Collins could inspect my legs.
02My four spider-like landing legs had been folded tight inside the Saturn V rocket since launch. If even one lock had failed to click into place, touching the Moon would tip us over.
AS11-40-5902 (20 July 1969) --- Astronaut Edwin E.
Eagle"The Eagle has wings," Neil radioed—because I was built as two machines bolted together.
NASA/JSC
03My golden lower half—the Descent Stage—held a throttleable rocket engine, four shock-absorbing legs, and hidden science bays. My silver upper half—the Ascent Stage—held the breathing air, the computers, and a separate escape engine.
Michael stayed alone in orbit, while both halves of me dived toward a world no human had ever touched.
04Only my top half was ever meant to come back to him. My bottom half was flying toward the place where it would stay forever.

The big idea

Eagle was built as two separate spacecraft joined by explosive bolts: a golden Descent Stage to land and stay on the Moon, and a silver Ascent Stage to blast the crew back to orbit.

Think about it

Why was it safer and lighter to leave the landing legs and descent engine behind on the Moon instead of flying the whole lander back to orbit?

In this chapter: Docking tunnel latch, four fold-out landing legs, Ascent and Descent stages

Sources: Main record

Machine illustration: AI-made. Photos: NASA Image and Video Library, credited on each picture.

Chapter 1 of 10

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