[before Mako can entirely clear the ladder, Magnet jumps up and chomps onto his pantleg so he too can get a ride up, hopping onto the deck and sniffing around once he can get his front paws onto something solid.

meanwhile, Manabu straightens, giving Mako a curious look at the question.]

How to tell? [??] I mean...yeah, of course. We have star charts, instruments to map out size, density, and air quality... But if you mean just by eyeballing it? That's kind of tricky, given how big things can get out there...