[moistgorilla]

The first thing I thought of when I saw this video was that this group did it before SpaceX without knowing SpaceX was trying to solve the harder problem.

[ethbro]

It seems like this gets understated (probably because, you know, it's our planet): just how energy-intensive it is to get things into Earth orbit.

Reddit has a nice delta V chart: http://i.imgur.com/SqdzxzF.png (source: https://www.reddit.com/r/space/comments/1ktjfi/deltav_map_of...)

There's also the linked NASA version: http://trajbrowser.arc.nasa.gov/traj_browser.php?NEOs=on&NEA...