It would require a spacecraft that can negate the force of gravity to fly out ouf the Polar Openings as gravity would pull any boat or airplane to follow the outer-to-inner surface.
(It; would require; a spacecraft that can negate the force of gravity) (a spacecraft; can negate; the force of gravity to fly out ouf the Polar Openings) (gravity; would pull; any boat or airplane; to follow the outer-to-inner surface)
It a spacecraft gravity
would require can negate would pull
a spacecraft that can negate the force of gravity
the force of gravity to fly out ouf the Polar Openings
any boat or airplane to follow the outer-to-inner surface