Astronaut Scientific Debriefings, 1962-1963

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Schirra - Very good, a better way of saying it.
O'Keefe - "Airglow" is a very complicated term.
We don't know
what it is all about.
That's what we are after. ...
Schirra - In fact, on occasion I have used airglow through
here just out of ignorance.
I think what we all are trying
to do right here is to try and clear up some of this ignorance;
so we need more data, of course.
Then,I say (reading from the
Blue Book again) "We'll see if she holds up," meaning, can I
track Mercury through all this?
That was interesting in
itself, that I could, I thought.
O'Keefe - This was quite important.
This was one of the
questions raised by Glenn on his flight whether some layers
are opaque or not.
Schirra - I could track Mercury through all of these points
or layers.
Nicks - Does it change its apparent size like the sun when it
sets?
Schirra ~ I don't recall having observed this.
Roman - Did you see any additional stars ... the fact that it
has a finite disk (Mercury)?
Schirra - No, again the window cuts out the fun of that, I
think.
O'Keefe - No, you wouldn't see a disk ....
Schirra - It would have been great to have had some magnifying
device at this point to make this observation.
No, it just looked