Google Moon is a service similar to Google Maps

Google Maps

Google Maps is a web mapping service application and technology provided by Google, free , that powers many map-based services, including the Google Maps website, Google Ride Finder, Google Transit, and maps embedded on third-party websites via the Google Maps API...

 that shows satellite images of the Moon

Moon

The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...

. It was launched by Google

Google

Google Inc. is an American multinational public corporation invested in Internet search, cloud computing, and advertising technologies. Google hosts and develops a number of Internet-based services and products, and generates profit primarily from advertising through its AdWords program...

 on July 20, 2005, the 36th anniversary of the Apollo 11

Apollo 11

In early 1969, Bill Anders accepted a job with the National Space Council effective in August 1969 and announced his retirement as an astronaut. At that point Ken Mattingly was moved from the support crew into parallel training with Anders as backup Command Module Pilot in case Apollo 11 was...

 lunar landing. The landing site of each of the Apollo missions is shown on the satellite image, providing more information on each mission as the user zooms in.
The first version of Google Moon only included low-resolution satellite imagery of the entire Moon, and when zoomed in too far, a Swiss Cheese

The Moon is made of green cheese

"The Moon is made of green cheese" is a statement referring to a fanciful belief that the Moon is composed of cheese. In its original formulation as a proverb and metaphor for credulity with roots in fable, this refers to the perception of a simpleton who sees a reflection of the Moon in water and...

 pattern would appear.
Apollo provides information about each of the Apollo missions, including placemarks, maps, images, video, and Street View

Google Street View

Google Street View is a technology featured in Google Maps and Google Earth that provides panoramic views from various positions along many streets in the world...

-style panoramas, all provided by NASA

NASA

The National Aeronautics and Space Administration is the agency of the United States government that is responsible for the nation's civilian space program and for aeronautics and aerospace research...

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This mode provides the satellite imagery for the Moon, provided by the Clementine mission

Clementine mission

Clementine was a joint space project between the Ballistic Missile Defense Organization and NASA...

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A Charts layer is also available.