Sometimes, the obvious answer is the correct answer.

When the star chart is first picked up, the constellations are in a constant state of flux, the stars flicking from place to place and forming new shapes. Unusual constellations like the ones outside. A diligent Astronomy student, Armani is able to recognize that all of these are off...until they're not. His knowledge seems to freeze the true circumpolar constellations in place on the chart and then everything begins to shake. Not the caravan. But everything, as if this small sliver of a dreamscape is experiencing an earthquake.