Gemini 4 Experiment Debriefing, 1967

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all over. Millions of them. And it doesn't make any difference which way they are going but you can see them come off by the window and they look like they are going off spherically, from what you can see. Now maybe they are not going out the back, but I doubt that.

Did you see them at any other time? Glenn mentioned that he had seen them, ice crystals, they weren't associated with such situations as this -

You see a crystal or two go by every once in a while.

You know, I think that these are associated with systems in the spacecraft.

The exhaust?

Yes, we've got a water cooler and the water separator and the suit loop pumps in the water and the evaporator, and there are things going overboard.

I think that it might be pretty obvious that they're from the spacecraft. They are going away generally.

I think a point that Jim made, and I think I've made it clear, but maybe not, that they were actually going small end forward, actually, the first time we were going front end forward quite a bit, and it looked like the streamlines were going back, and you thought, well, that is the way it ought to go, there is a little bit of flow. But several times we got around to going small end forward and the streamline and the little particles were going equally as well this way.

So, I know that this is a theory that some people had that there is enough particles even in a very reduced flow area to cause a streamline but apparently not.

Gordon Cooper said he thought that he could use it as a yaw reference if he had to, perhaps.