noticed the moon floating in the sky at the same time the sun was
shining, a phenomenon which is often visible on the earth early in the
morning at certain of the moon's phases.

"Will we ever get there?" asked Jack.

"Of course," replied Mr. Roumann. "You must remember, Jack, that the
moon is moving at the same time we are. Had I headed the projectile for
Luna, and kept it on that course, she would, by the time we reached
her, been in another part of the firmament, and we would have overshot
our mark. So, instead, I aimed the _Annihilator_ at a spot in the
heavens where I calculated the moon would be when we arrived there.
And, if I am not mistaken, we will reach there at the same time, and
drop gently down on Luna."

"Oh, is that it?" asked the lad, much relieved.

"That's it," replied Mr. Henderson. "And that's why we seem to be
headed away from the moon. Her motion will bring her into the right
position for us to land on when the time comes."

"Then I'd better go tell Mark," said the lad. "He's quite worried." He
soon explained matters to his chum, and together they discussed the
many things necessary to keep in mind when one navigates the heavens.

That day saw several thousand more miles reeled off on the journey to
the moon, and that evening (or rather what corresponded to evening, for
it was perpetual daylight) they began to make their preparations for
landing. Their wonderful journey through space was nearing an end.