 Now, if he could get a gang up the thousand miles to the sky with enough torches to melt the cracks, it might recongeal as a perfect sphere.
The sky had never been cracked from its spherical shape. 
mnli hypothesis: The sky had never been cracked from its spherical shape.  premise:  Now, if he could get a gang up the thousand miles to the sky with enough torches to melt the cracks, it might recongeal as a perfect sphere.