Why was Neil Armstrong first on the moon?

July 30, 2009

First, […] Armstrong would have priority simply because he was the senior astronaut.

[…]

And second, [the Lunar Module's moonwalk hatch] swung open away from the commander and toward the pilot. So when the hatch was open, Armstrong had a clear path to maneuver out through the opening, while Aldrin was penned in behind the hatch.

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