Porcupines in Diapers and Egg-Shaped Orbs

In an article about Israeli solar fields, the Wall Street Journal provides its daily dose of weird with this sentence:

AORA’s field is occupied by dozens of giant mirrors all trained on an egg-shaped orb perched atop a tower. It is built with what AORA calls its “porcupine in a diaper” technology, according to Mr. Weisinger.