Not really in the gravity falls fandom but something struck me during the episode that I needed to share. As Ford is dragged away to space purple things flash in the air. First this 

Then it zooms in on this

Which looks a lot like the Big Dipper reversed. 

See? Then it flickers over each of the dots

 and settles on one of them, which looking at the star map above probably corresponds to Megrez

before zooming in even farther to what looks like a planetary system.

And choosing one of the planets there and zooming in on it. 

Basically I’m pretty sure these aliens come from, or at least were sending Ford to, the second or third planet orbiting the star Megrez in Ursa Major. 

Bonus: Dipper comparisons.