Astronaut Scientific Debriefings, 1962-1963

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. Scientific Debriefing
-34­
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;._~d _spread. It doesn't take long. As it goes on down you still have this orange
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fight on the horizon and this area is all considerably ligliter althou~ black is
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goming on down.
You do · ge~· glow up off it. You could actu~ sWing away and tell
l light w ere tlle sun ll&d set a number of seconds after. It is not ray-like. It
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is hard to describe. ~e sky area: is lighter but there are not any rays. ,
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Note:
At this time there was a general discussion of the night sky ,immediately
af'ter sunset. The transcript is too incomplete in this region to give a recorded •
account of this discussion. It appears that after describing the sunset and the
airglow layer someone Ast. Cooper an additional glow extending vertical above the
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position on the horizon 'Where sunset occurred. Obviously reference was being
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made to observation of the Zodiacal light.
Cooper:
That' s right. After this effect disappears ( glow of sunset) and you •
think you're on complete darkness, I would guess on the order a minute after
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sunset, you get this other.
I gue.ss two different times I saw faint glow but not
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very far along. It lfS.S more on the order of 3 to 4 degrees farther on
•and a fainter order. . ,
Roach :
Did you 'notice this was cone shaped?
Cooper:
A little bit cone shaped.
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Roach:
Did you happen to sweep across it that way?
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Cooper: It was a minute or so prior to sunrise and I moved back across and about
the time I got back the sun was there.
Roach:
Did it seem to be confined in your Window'l
Cooper : Yes.
The bright
0blue-band grew wider as you moved away.
Roach:
Was this jus~ before sunrise?
Cooper:
The sun is . getting ready to come up and at' this particular time I got
this glow prior to getting a blue band and in a few seconds the blue widens and '
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. widens. ,
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