Altitude 800km. The dark region in the left
foreground is the Mare Tranquillitatis. To the top right is the Mare
Fecunditatis, with the Mare Crisium visible towards the left of the
Altitude 400km. Near the centre of the image is the
24km crater Maskelyne, and slightly nearer is its 9km companion Maskelyne B.
Altitude 200km. The 6.5km crater Moltke is visible to
the lower-right. Directly below the Maskelyne / Maskelyne B formation
in the foreground is the 4.6km crater Armstrong (named after the astronaut).
Altitude 100km. Molkte can now be seen in some detail
at the bottom-right of the image. It is known to have a particularly
bright halo, and is easily visible using modest earth-based telescopes.
Altitude 50km. The 2.4km crater Collins is visible in
the bottom-left corner. The Surveyor 5 probe made a soft-landing
relatively near this point in September 1967.
The flat expanse of the Mare Tranquillitatis can be clearly seen. Its
smoothness made it a suitable site for the first lunar landing. Later
missions explored regions with a much more "interesting" topography.