THE SUN IS MOVING
April to September Midnight Sun in Longyearbyen, Svalbard, Norway. Not possible on a rotating globe.
Sundial timelapse. It's obvious that the sun is moving and not the earth. At 107 000 km/h.
Timelapse: Sun in zenit over Antarctica. Impossible if earth were a globe rotaring around the sun with Antarctica on "the bottom of the world".
Your return home is as certain as the path of the sun is determined
before it rises, after it has set, and the semi-bright ones
the hours in between.