The Space Pen Myth: Why NASA Couldn't Just Use a Pencil in Orbit

**pplpod** (0:00)
Welcome to today's Deep Dive. I'm your host, and sitting across from me, as always, is our resident expert. And today, we are tackling something you have almost certainly heard before.

**SPEAKER_2** (0:10)
Oh yeah, we are getting into one of the most famous, probably the most repeated parables of the entire space age.

**pplpod** (0:18)
Right, it goes like this. So during the space race, NASA realized that standard ballpoint pens wouldn't work in zero gravity.

**SPEAKER_2** (0:25)
Because gravity isn't there to pull the ink down.

**pplpod** (0:27)
Exactly, so the agency allegedly spent millions of taxpayer dollars and years of research developing this high tech pen that could write in space. And the Soviets, well, they just used a pencil.

**SPEAKER_2** (0:40)
It really is the ultimate punchline. I mean, when you hear it, it sounds like a perfect little fable about, you know, government over complication.

**pplpod** (0:46)
Loaded bureaucracy.

**SPEAKER_2** (0:47)
Right, and just the triumph of simple, everyday common sense.

**pplpod** (0:51)
It is such a satisfying story. But if you're listening to this right now and kind of nodding along, I really have to stop you right there.

**SPEAKER_2** (0:57)
Please do.

**pplpod** (0:57)
Because not only is that satisfying story completely false, but that so-called common sense solution.

**SPEAKER_2** (1:04)
Taking a regular pencil into orbit.

**pplpod** (1:06)
Right, taking a pencil up there. It was actually a massive, life-threatening safety hazard for everyone on board those early spacecraft. So today, our mission for this deep dive is to take our stack of sources and completely dismantle this urban legend.

**SPEAKER_2** (1:20)
We're going to get into the really high-stakes engineering required to make ink flow without gravity.

**pplpod** (1:25)
And we'll look at how a massive, private gamble created an absolute pop culture icon that honestly is still orbiting the Earth right now.

**SPEAKER_2** (1:34)
Yeah, to really grasp why this myth is so backwards, we first have to kind of put ourselves inside one of those early space capsules.

**pplpod** (1:41)
We have to look at why that punch line.

**SPEAKER_2** (1:43)
Just using a pencil.

**pplpod** (1:44)
Right, why that was something space agencies were actually terrified of. So just to be clear upfront, did anyone ever use pencils in space?

**SPEAKER_2** (1:52)
They did actually. In the early days of spaceflight, both the Americans and the Soviets used pencils.

**pplpod** (1:57)
Okay.

**SPEAKER_2** (1:58)
That is basically the one tiny sliver of truth the myth hangs on to. The Soviets used regular pencils and they also used these grease pencils on plastic slates.

**pplpod** (2:06)
And NASA.

**SPEAKER_2** (2:07)
NASA, for their part, actually put in a purchase order in 1965 for a batch of mechanical pencils.

**pplpod** (2:13)
Right, but they realized pretty quickly that was a huge mistake.

**SPEAKER_2** (2:16)
A catastrophic one waiting to happen, yeah. I mean, you have to picture what a 1960 spacecraft actually is.

**pplpod** (2:23)
It's small.

**SPEAKER_2** (2:24)
It is a tiny sealed, highly pressurized metal tube. And it is packed floor to ceiling with exposed switches, complex wiring, electrical panels.

**pplpod** (2:34)
And vital life support systems.

**SPEAKER_2** (2:36)
Exactly. Yeah. And crucially, it is operating in microgravity.

**pplpod** (2:40)
Okay, so if I'm an astronaut and I'm, you know, jotting down some flight data with a regular pencil and I press just a little too hard.

**SPEAKER_2** (2:47)
Snap. Right.

**pplpod** (2:48)
The tip snaps off. Down here on earth, if I break my pencil tip, it just falls on my desk. I brush it onto the floor, maybe vacuum it up later. It's totally harmless.

**SPEAKER_2** (2:56)
But in microgravity, that broken piece of graphite doesn't fall.

**pplpod** (3:00)
It floats.

**SPEAKER_2** (3:01)
It just drifts away from the paper. It gets carried by the ambient air currents that are constantly circulating inside the cabin.

**pplpod** (3:08)
I see where this is going because graphite is just a form of carbon, right?

**SPEAKER_2** (3:11)
Right.

**pplpod** (3:12)
Which means it conducts electricity.

**SPEAKER_2** (3:13)
Highly conductive. So now you have a tiny, highly conductive piece of physical debris floating around.

**pplpod** (3:20)
Waiting to get sucked into a ventilation grate.

**SPEAKER_2** (3:22)
Or drift behind an electrical panel where thousands of exposed wires are managing the ship's navigation.

**pplpod** (3:28)
And the oxygen.

**SPEAKER_2** (3:29)
Exactly. The danger of that graphite bridging a connection and causing a short circuit was incredibly high.

**pplpod** (3:36)
Wait, I'm trying to picture this. So using a pencil in a space capsule is basically like eating a crumbly, dry granola bar inside a server room.

**SPEAKER_2** (3:44)
That's a great way to put it.

**pplpod** (3:45)
Except gravity is turned off, and a single floating crumb getting into a server rack could literally short circuit your life support system.