Weather and technical conditions permitting, a spacecraft will Tuesday be launched vertically from a location southeast of El Paso. It’s expected to reach an altitude of 66 miles (106 km), leaving no doubt that it crossed the boundary between the sky and outer space — assuming everything goes well, of course. This launch will be particularly interesting for one reason: Jeff Bezos, the enormously wealthy founder of Amazon, as well as his own space company, Blue Origin, will be on board.