He suggests an existing commercial payload slung beneath a less visible balloon.
Occam's Razor.
I just watched this about our place in Universe.
Apart from the 'Dark Matter' side-plot, It's a comparison of frames of refrence that seques into Niburu-
OMG-we're-all-gonna-die!
The 60* angle of the plane of the Ecliptic to it's direction of travel maps onto the four seasons.