Hmm - looking at that cartoon. It almost looks as if the moon (and planets with no magnetic field?) is a big battery - a rechargable solar battery.
A couple of big steel posts and 4,000 miles of wire ....
I got that graphic from here.
https://science.nasa.gov/science-news/science-at-nasa/2008/10apr_moondustinthewind
Not really sure how it’s related to the topic of the article.
In a hurry, I assumed it somehow was...