There no any need to tell about qualities of Google earth. if you had used it . Google earth provides you to take the tour of earth by setting the the front of Internet. according to me one of the best feature of Google Earth is finding of direction between two location is a just a click way. Do you know that with the help of Google Earth you not only take the tour of earth but also of moon.To use moon in Google earth you have no any need to download anything else . if you have Google Earth 5, you can select Moon from the top "Toolbar" to start exploring moon.
With moon in Google Earth you can do following.
1. Take tour of landing sites, narrated by Apollo Astronauts.
2. View 3D models of landed Spacecraft.
3.Zoom into 360 degree photos to size astronauts footprints.
4. Watch rare TV footage of the Apollo mission.