http://joshworth.com/dev/pixelspace/pixelspace_solarsystem.html
The Solar System Visualized in Scale
earthengine.google.com/timelapse
View thirty years of satellite images in one continuous timelapse.
Let's students/teachers view actual size of countries to one another.
https://www.google.com/get/sunroof
Check useable sunlight and available square footage for solar panels.