floated free. It was no longer in the Earth's atmosphere but in the realm of interplanetary space.
Sedgwick noted that gravity had ceased now that the ship was at rest. He knew that his velocity, even with the rockets off, would continue unabated. The sphere had passed the escape-speed for Terra.
It was in free space, the dials registered no pressure on the hull. To one side a dial noted a steady flow of heat, that would be the sun. On another side registered a dim flow of light. That would be the earth-glow. The rest was darkness.
But the man was strapped in his seat and there was nothing loose in the bubble and, outside of the curious feeling in his stomach and head and the indisputable evidence of the omniscent meters, there was no evidence that the sphere was free of planetary gravity, free in the empty void between the planets.
From his photo-cells, the pilot knew what things were like outside. He flicked another button and cameras in the surface took a record of the scene, a record which would be much more accurate than anything he could see with the naked eye.
Sedgwick wondered whether man ever would see space with the bare eye. He glanced at another part of his controls and reflected that it was unlikely. Cosmic rays were bombarding the craft with incredible fury, unhampered by a hundred miles of atmosphere which alone kept life from being burned out of existence on earth. Here, he knew that only several shells of thick lead and steel, fifty feet of metal machinery in any direction, concentrations of chemicals and fuel, air supplies, food and swarms of wire, kept the cosmic rays from reaching him and torturing the life from his flesh.
Protoplasm is a very delicate chemical compound, the thought suddenly occurred to Sedgwick, and it must be kept carefully sealed from raw force. It survived only within certain very narrow limits of temperature and under certain very restricted conditions of gases. Here he glanced again at the conditioning charts but all was well. Those limited conditions that kept his metal fish-bowl fit for the fish were working to perfection. Metal and rubber, plastics and glass, electricity and atoms, all lifeless and unimaginative, were harnessed here to keeping the little bit of water and carbon mush that was Edward Sedgwick liquescent. The subjective term was "alive."
Still, this little bit of mush, this complex and unstable compound that was man, had built for itself the means wherewith it could master the antagonistic cosmos. Here was man, here within this little bubble of air in the midst of this greater bubble of metal, bravely dashing around in the domain hitherto exclusively reserved for planets and comets and suns. Mankind had usurped the privileges of stars and Sedgwick was the first to exercise this conquest.
He reset his meters. His chair swivelled slightly. Rapidly his hands pressed a half dozen buttons. Acceleration started again. An integrator clicked out a set of numbers in its little glass face. They were set up on the controls and put to work.
He watched the glass panels as the maneuver went into effect. The ship accelerated again. The direction was different. The sun below him. The sphere was heading away from the sun. The earth too was behind. Ahead was Mars. Not directly ahead but the sphere and the planet were both travelling towards the same point in space.
Sedgwick was not going all the way to Mars. He was going only part way there. Cameras would record further data and the globe would return to earth. Maybe it would go all the way to the red planet some day but this was only a test.
For two days the sphere continued on its course. Acceleration of the rockets had been cut off after about four hours. At that time the metal ball was travelling at an unbelievable speed. Sedgwick could have made Mars in a week at that rate but he knew his limitations and he had his orders. He had been given this post because of his level-headed judgement, he did not betray that trust.
During those forty-eight hours, Sedgwick had little to do besides check his controls. He was fed regularly by an automatic panel which every four hours thrust pellets of food-concentrate at him and the nozzle of a water valve. Also he catnapped when he felt tired. Automatic alarms would have awakened him if there had been need.
At one time there had been a momentary flickering of gravitation dials. There was nothing to be done for what was detected was a sizable body about fifty thousand miles away. The sizable body being undoubtedly an asteroid of perhaps ten miles diameter. No concern.
Only one other thing broke the monotony. One of a cluster of photosensitive cells on the sphere's skin went black. It was smashed. A meteor obviously, a tiny pellet of rock flying through space. Sedgwick wondered why more had not hit him; he had expected more trouble than that. Then he realized that after all space was really terribly terribly empty and besides it was possible a number of others had hit the surface where it would not be detected nor indeed make any difference.
The sphere was brought to a halt at the proper time and hung in space slowly revolving on its own axis. It was now about six million miles from Mars and there it would wait for ten hours or so until the red planet had been thoroughly photographed by the
