WebEarth builds a live X3DOM model of Earth as it is right now . Drawing from composite sattelite photos created by John Walker, WebEarth employs a set of server-side scripts which build the model and maintain the current image database.
WebEarth has been tested and should be viewable on current releases of Chrome, Chrome for Android, Firefox, and MSIE 11. If you're using OSX Safari, you'll have to turn WebGL on. Instructions to do this can be found here.