Tesi Lexico was the daughter of Professor Regean Lexico who learned of the powerful energy source he dubbed "Star Dust" that he learned was located on the so-called star named Cygni. Knowing that it was a powerful replacement for radium, he stowed away on the rocket owned by Zephyr Jones, and Tesi snuck onboard behind him. Her father helf Zephyr and his pal Corky Grogan at gunpoint Tesi managed to convince the pair to take them there. On the "star", Lexico sprayed both Zephyr and Corky with a chemical that would allow them to survive on the surface. Lexico and Tesi were soon captured by the dwarfish Cygnians and needed to be rescued by Zephyr and Corky. After their attackers were buried under tons of rock, they collected 50 pounds of "Star Dust" and left for a return trip from Earth.
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