The post title is actually completely non-conceptual. I was just reading an article on a project mapping tube-shaped corridors in space where there is a strong gravitational pull in a specific direction …the effect of which is like a consistent trade wind or ocean current pulling you toward your destination.
Here’s the (slightly more) technical description:
http://www.physorg.com/news172302860.html
And a more readable one:
http://www.popsci.com/military-aviation-amp-space/article/2009-09/scientists-map-out-gravitational-space-highways
Also… if you haven’t seen any of the new Hubble images since the sensor was replaced, they are spectacular. Note that since NASA is a government org, these images are all in the public domain and are accessible in uber-high resolution to download for free (think 20×30″ digital photo prints). Link here.
