Preliminary Gemini 4 Crew Debriefing, Part II, 1965

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207
White
McDivitt
I think we took some good pictures of the clouds.
Yes.
Well, throughout the four days we had
cloud coverage over things we wanted to take
pictures of. Other times we didn't have any at
all. It was a variable thing, and w.e just got
a lot of good cloud pictures, I hope.
Horizons.
Well, at night there was a definite
dark horizon, which I assume is the earth's
horizon.
And then there ' s a dim band, and then
above that there's a br ight band that is much
narrower than the dim band, and above that it is
clear, and
then
nothing.
I guess there are
really three horizons. There's the top of what
I think is the earth. There's a top of the dim
band, and then there ' s a top of the bright band.
In the daylight you don't see these dim and bright
bands.
It's just a gradual decreasing in
intensity of light. It starts out with a very
light blue at the horizon and just gradually
goes out to the dark blue, and it finally just
goes t o black. Right at sundown,if you're
pointing 90 degrees to wher e the sun is, you
can see the light blue of the day sky coming