Discovery on its way, one last time.

Some lucky people got to see Discovery launch on it's final mission the other day. This image from an airliner (in the right place at the right time) is awesome. 
Humans accelerating millions of pounds of spacecraft to 17,000mph is puny in comparison to nature and the grand scheme of things. 
The Pale Blue Dot, up close.

via @Crooooow from an airline window seat