Islands of Space

by Jr. John W. Campbell

The observatory was located on the barren peak of a great mountain more than nine miles high. It was almost the perfect place for an astronomical telescope. Here, well above the troposphere, the air was thin and always clear. The solid rock of the mountain was far from disturbing influences which might cause any vibration in the telescope.

The observatory was accessible only from a spaceship or air flyer, and, at that altitude, had to be pressurized and sealed against the thin, cold air outside. Within, the temperature was kept constant to a fraction of a degree to keep thermal expansion from throwing the mirror out of true.

Arcot and Morey, accompanied by Tharlano and Torlos, settled the Ancient Mariner to the landing field that had been blasted out of the rock of the towering mountain. They went over to the observatory and were at once admitted to the airlock.

The floor was of smoothed, solid rock, and in this, the great clock which timed and moved the telescope was set.

The entire observatory was, of course, surrounded by a magnetic shield, and it was necessary to make sure there were no enemy ships around before using the telescope, because the magnetic field affected the light rays passing through it.

The mirror for the huge reflecting telescope was nearly three hundred inches in diameter, and was powerful enough to spot a spaceship leaving Sator. Its military usefulness, however, was practically nil, since painting the ships black made them totally invisible.

There were half a dozen assistants with Tharlano at the observatory at all times, one of them in charge of the great file of plates that were kept on hand. Every plate made was printed in triplicate, to prevent their being destroyed in a raid. The original was kept at the observatory, and copies were sent to two of the largest cities on Nansal. It was from this file that Tharlano had gathered the data necessary to show Arcot his own galaxy.

Tharlano was proudly explaining the telescope to Arcot, realizing that the telectroscope was far better, but knowing that the Earthmen would appreciate this triumph of mechanical perfection. Arcot and Morey were both intensely interested in the discussion, while Torlos, slightly bored by a subject he knew next to nothing about, was examining the rest of the observatory.

Suddenly, he cried out in warning, and leaped a full thirty feet over the rock floor to gather Arcot and Morey in his great arms. There was a sharp, distinct snap of a pneumatic pistol, and the thud of a bullet. Arcot and Morey each felt Torlos jerk!

Quick as a flash, Torlos pushed the two men behind the great tube of the telescope. He leaped over it and across the room, and disappeared into the supply room. There was the noise of a scuffle, another crack from a pneumatic pistol, and the sudden crash and tinkle of broken glass.