Simple, very simple…
1. Download Google Earth from the Google Earth website.
The linux version will be automatically chosen when downloading from Ubuntu.
2. Open a terminal from Applications -> Accessories -> Terminal.
3. cd into the directory where you saved Google Earth. For example, if you saved it to the Desktop type:
cd ~/Desktop
4. Make it executable by typing:
chmod +x GoogleEarthLinux.bin
5. Run the installer by typing:
sudo ./GoogleEarthLinux.bin
6. Leave the default options and click Begin Install.
7. When installation is complete, press Quit.
Do not press Start as this will run it as root which is never a good idea.
A file named Google-googleearth.desktop will be installed on the Desktop. This file is safe to delete.