Radiation in space also poses some problems. Space travel requires high speed, and astronauts can pass through a radiation belt in so short a time that the exposure isn't harmful. But a very large cloud might pose problems and Willy would have to meet such an emergency by determining the size of the cloud and the best way to pierce it.

Another hazard could be faulty astrogation. On a 75,000,000-mile trip—the distance we were to travel to reach Mars—a small error at the start might put the ship too far from Mars to be caught by the planet's gravity at the end of the voyage. Willy had to make observations throughout the test flight and go through operations necessary to correct his trajectory. There might be other minor emergencies, such as failure of equipment and instruments, but Willy had demonstrated his ability to cope with them in tests conducted on the ground.

Dr. Warner Joel entered the room. A few months ago he had been overweight, but stringent diet had cut his weight down enough to allow him to qualify for our crew. He was a short, stocky man, with a smooth face and nervous manner. However, his knowledge of geology had made him almost indispensable. Rarely do you find a man with his experience in this particular field who can also qualify for the stringencies of space flight.

There was one thing against Joel that I was determined to overlook and this was his rather ingratiating manner, his eagerness to appear to be more than he was, and his intense desire to win favor from Dr. Spartan.

As he entered he hailed everyone in a loud voice, speaking to no one in particular. And no one in particular answered. Ignoring the rebuff, and with a strict eye to protocol, he walked over to the control board where Dr. Spartan was seated.

"Great show, Doctor! Brilliant show!" Joel exclaimed, extending his hand as if he were congratulating a playwright on opening night.

Spartan, his dark eyes glued to the instruments in front of him, ignored Joel.

"Yes, sir!" the geologist continued, putting his hand in his coat pocket, probably to give it warmth after Spartan's coolness. "We've got a good man in Willy Zinder. I always did say this boy was a sleeper. Better than a lot of men in our group, in fact."

Axel nudged me in the ribs and, as I turned, he winked one of his ice-blue eyes. "Meaning me or you, Bill?"

"You, you big Swede," I said, winking back. "But my opinion puts Willy several notches above Joel, too."