Satellite Observatory

Image credit: Boeing Aircraft Company
Image source: Mike Acs

S-69-60223

Image credit: North American Rockwell
Images: NASA, Mike Acs

Bonestell Moonscape

Image credit: NASA
Images: Mike Acs, Dan Beaumont Space Museum

S70-26310

Just to illustrate just how utterly massive the R-134B would have been, take a look at this illustration from a report written by Jack Swigert for The Society of Experimental Test Pilots:

Image credit: NASA
Image source: Mike Acs

Early Lander Concept

Image credit: NASA
Images: Mike Acs, Drew Granston

We Land On The Moon

NASA artwork as it appeared in We Land On The Moon by John Raymond in 1963.

see also:

Beautiful scan of an original NASA issued lithograph.

and also:

Image credit: NASA
Image source: Mike Acs, Drew Granston, Numbers Station

Deep Space EVA

Image credit: NASA
Image source: Mike Acs

Drawbridge Orbiter

Image credit: McDonnell Douglas
Image source: Mike Acs