Unlike many other Google logos, Google Earth's logos don't include any text at all.
Google Earth started development in 2001. Its initial release was on June 11th, 2001.
2015–present (Android and Web)
This logo first appeared on the Android 5.0 Lollipop Google Earth app. The non-3D version is shown at the full list of Google Apps. The non-3D version also sports a different white points and a slightly different blue used for the lines.