If you enable the 'Status Bar' option under View menu then imagery dates (if available) will appear in status bar that shows at bottom of the map window in Google Earth.
Dates are approximate. Sometimes dates are when the imagery was processed as opposed to when it was captured so you could have an image with snow on the ground with a date in July.
For more details on dates in Google Earth imagery see related link below to article.
For Street View imagery the date of a Street View is displayed bottom right of the image (but not the time). For dates of base imagery try Google Earth for the same scene which shows the imagery date. Google Earth (unlike Google Maps) has historical imagery showing all previous versions of imagery that Google has for the particular area.
There are many different logos for Earth Day. You can do a Google image search for them.
For Street View imagery the date of a Street View is displayed bottom right of the image (but not the time).For dates of the base imagery in Google Maps you'll need to use Google Earth and locate the same location and zoom level for the same view to see the imagery date. For whatever reason the imagery dates are not shown in Google Maps. Google Earth (unlike Google Maps) has historical imagery showing all previous versions of imagery that Google has for the particular area.See related question to show dates in Google Earth.
If you select the 'Status Bar' option in View menu of Google Earth then the imagery date will appear in the lower left of the map.
When the Google Earth application is running, open the Help menu and select the "About Google Earth" item. This will open a popup window with Google Earth version (e.g. 7.3.0.3830), build date, renderer (OpenGL or DirectX), etc.With Apple iPhone or iTouch, start Google Earth application. Open menu, then click Settings and scroll to end of the list to find the Google Earth version.
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To find google earth images, you need to go to google first and click on the satellite tab that will show you the views from a satellite rather than the street view or the walking view.
you can find the southern cross image on Google images
maybe on google image..
If you have Google Earth look for Prado Museum. You'll find the Bosch work clickable to enlarge nearly indefinitely. Google Earth can be downloaded for free.
google it
Google image search.