A great image of our Earth from Saturn.
http://www.nasa.gov/sites/default/fi...?itok=DIJv2DwN
More pictures are from
http://www.nasa.gov/mission_pages/ca...ain/index.html
To imagine: the Earth looks at most 2" large (mv=+3) and the Moon 0.5" (mv=+8) max. 48" separated.
So a 20cm telescope is required to see Earth as a (tiny) ball and binos are required to see the Moon and a 75cm scope is required to see the Moon as a ball.
7 billion people living on such a tiny 'star' like object !