Version 4.2 of Google Earth, which added the new sky tool for watching the stars, is also more accurate on Earth displaying images - up to 0.3 meters in resolution (and in rare cases even less). But without a doubt the new sky tool is the highlight of this recent release. The ability to add text and links to heavenly bodies in order to receive external information (for instance from Wikipedia) significantly improves the user experience and can be used as a basic tool for learning astronomy. 

Although the software seems to work well, don't expect too much of the resolution in space. Many areas are not covered at all and others have very low resolution. Trying to look for the planets in our solar system also proved to be less intuitive than one would expect. However, if this feature will evolve like the rest of the software it will probably become a huge success.