A Tesla in space

It was spectacular.

In fact, it was as spectacular as in the old days.

Elon Musk, famous billionaire visionary, pulled off a coup that could change the world.

On Tuesday, his company SpaceX launched what is reportedly the world’s most powerful rocket.

It was a successful launch. Then, to cap off the achievement two of the three boosters successfully returned to earth landing upright and undamaged, ready for reuse. The third, programmed to land on a barge in the ocean, failed and crashed into the sea.

The point of returning the boosters for more launches is that the cost of space travel can be...