[astroflask]

> In our unfortunately light polluted night sky we can barely see the stars, but shouldn't the astronauts see the earth within a shimmer of billion stars?

No, you have to be in the night side, or looking into the void (no Earth surface visible, definitely not the Sun in sight, not any part of your spacecraft being shined upon) for your eyes to adjust to the darkness and then you get to see the stars. Being near the Moon, I'd add "no moon surface" to that list.

> Or is the source material not showing stars due to a lack of exposure?

I'm not sure there... Film behaves differently than image sensors. Maybe if we had access to the negatives you could do some chemical magic to bring in detail. I don't know how hard/destructive that could be on the negatives, as film isn't a medium I've ever really used. Grew up in the 90's with a few film cameras, but digital took over before I had the chance to seriously get into photography and was also far cheaper (so, easier to pick up as a hobby for a teenager). Now I'm into digital image processing and that's a totally different beast on its own.