Earth Is Just a Pale Blue Dot... Or Pixel... Or...

The image above is what Earth looks like from Saturn, a stunning reminder from NASA's Cassini spacecraft that we're nothing but a small speck of dust. And sometimes, as xkcd points out below, that can be quite literal.

Earth Is Just a Pale Blue Dot... Or Pixel... Or...

All respect to Carl Sagan, but it's definitely hard sometimes to tell a dot from a pixel. And maybe that's even more to the point. [xkcd]