This is because all the pictures are taken by different satellites with different resolutions.
You can find information about areas with red borders on Google Earth by using the "Borders and Labels" layer. This layer displays political boundaries and can help you identify areas with red borders. Simply enable this layer in the Google Earth settings to view the information you are looking for.
Different regions of the Earth receive different amounts of solar energy.
Any areas visible by a satelite , that means the earth surface and oceans in their entirety , with the exception on some military areas. Germany houses and private areas are pixilated due to their privacy laws
To fetch new imagery you need a persistent internet connection. Google Earth uses a disk cache that allows you to navigate offline in the areas you already visited.When you go offline you can still navigate in Google Earth zoom in/out, but flying to new areas will only show a low-res base map data.
the functional areas of google are
physical life earth
Google Maps does not cover the area around the north and south pole. This is due to the use of standard map projection. Google Earth is used to cover these areas.
Most land areas in Google Earth are covered in satellite imagery with a resolution of about 15 meters per pixel and highest resolution is about 1 inch per pixel.
On average the imagery in Google Maps and Google Earth is approximately one to three years old so this is not uncommon. However, the more populous areas and major cities tend to be updated more often.
When the waves crashes into the earth it can start earthquakes in different areas unknown.
The aerial, satellite, and Street View imagery in Google Earth is not real-time (or live). But there is also a webcam layer integrated into Google Earth (enabled in Gallery layer) that can show "live" scenes at selected locations.
The images in Google Earth (and Google Maps) are updated on a continuous basis. It's hard to say exactly when an area will be updated because some areas may be updated more frequently than others. Google provides KML feeds showing what areas have been updated in a given update. Google also provides a notification service you can signup to alert you when a given area is updated. For details see the related question.