little math problem October 2018

[brickviking]

In addition, there's nothing I can see that mandated that the planet even have a magnetosphere, let alone that you could view the sky. Those two factors alone could count out most current dead-reckoning (i.e. with a compass, astrolabe or sextant), and may only leave you with mapping (this is where I've been and what direction I turned) or surveying tools (we've measured this far in this direction) that don't depend upon a magnetic field.



(Post 309)