ILLUSTRATIONS

Cover[i]
Frontispiece[ii]
Her nose pointed skyward, the Polaris was ready to blast off[21]
The Solar Guard worked late into the night, examining every ship in the Alliance[50]
The speedy little ship shot ahead of the fleet toward the gigantic mass of asteroids[90]
The Polaris landed safely on the surface of the satellite[105]
Bush pulled a paralo-ray gun from his belt and said, "All right, march!"[143]
"Hasn't anybody figured out why four hundred ships crashed in landing?" Strong asked.[159]
"We better take it easy, Astro," said Tom. "Turn off the lights."[171]