"Raj postulates access to higher spatial dimensions, but that's his answer to everything" got a chuckle out of me.
I think this bit works pretty well! Though I haven't read the rest of the story, it's obvious that this is information that ties into elements of the story that we would already care about, the lil illustrations are a nice touch, and you've kept the talky bits relatively short so it never feels like an overwhelming dump of text.
My thoughts on this practice in general is that... well, I don't think adding illustrations to a wordy bit is bad, but I do see it as sort of a bandaid rather than a fix. Like, if you have a bunch of words that are dull, then adding pictures can help alleviate the problem, but it would be better if the words weren't dull.
From another thread where exposition stuff came up --
I don't think Action Scene is always more interesting than Talky Scene, but the idea behind that suggestion is sound -- thinking about using a scene for more than just sharing information.