It is about 3' in diameter, and about 12,000 miles from the surface.

The result of the combined motions is that the two moons, to the eye, seem to move in opposite directions.

When we rose above the mists, Caulna was visible as a very fine crescent in the west; Zeelna was rising in the east, and almost full; but hardly a more brilliant object than Venus when seen to most advantage from Earth.

Both moved so rapidly among the stars that their celestial change of place was apparent from minute to minute.

But, as regarded our own position, the appearance was as opposite as their direction.