 What central difference between the planets Gloryanna and Mypore is most important to the story? Why is this significant to Hannah and the narrator?
Captain Hannah climbed painfully down from the Delta Crucis , hobbled across the spaceport to where Beulah and I were waiting to greet him and hit me in the eye. I only drink rhial when I've been exposed to Captain Hannah. I almost felt sorry for him, but just then Beulah came racking across the field with her two-ton infant in tow, to show her off to Hannah. The plant grew only on the single planet Mypore II. Transshipped seeds invariably failed to germinate, which explained its rarity. The Myporians were usually, and understandably, bitterly, opposed to letting any of the living plants get shipped off their planet. But when I offered them a sizable piece of cash plus a perpetual share of the profits for letting us take a load of marocca plants to Gloryanna III, they relented and, for the first time in history, gave their assent. "When I left, marocca was growing like mad," said Captain Hannah. Gloryanna III is almost a twin to Mypore II. Bright sun most of the time—that means an almost cloudless environment. But our tests showed that the plants had enough tolerance to cause no trouble in the trip in Delta Crucis ." "You'll remember that I warned you that we should take some marocca out into space and solve any problems we might find before committing ourselves to hauling a full load of it?" asked Captain Hannah. I almost asked him why he had been barricaded in the bathroom of the Delta Crucis , but I figured it was safer to let him tell me in his own way, in his own time. "Well," he said, "I got into parking orbit around Mypore without any trouble. And by the time I had lined up for Gloryanna and Jumped, I figured, like you said, that the trip would be a cakewalk. They 'remember' the rate and direction of movement, and keep it up during the night time. In Limbo, moving at multiple light-speeds, the whole Universe, of course, turns into a bright glowing spot in our direction of motion, with everything else dark. So I lined up the Delta Crucis perpendicular to her direction of motion, put a once-every-twenty-one hour spin on her to match the rotation rates of Mypore II and Gloryanna III, and uncovered the view ports to let in the light. It gradually brightened until 'noon time', with the ports pointing straight at the light source, and then dimmed until we had ten and one-half hours of darkness.
 Gloryanna has outlawed and eradicated the marocca plants, while Mypore continues to cultivate the plants. Hannah and the narrator think they will be able to make an enormous profit by transporting and selling the plants to Gloryanna.
 Mypore has outlawed and eradicated the marocca plants, while Gloryanna continues to cultivate them. Hannah and the narrator think they will be able to make an enormous profit by transporting and selling the plants to Mypore.  Gloryanna has outlawed and eradicated the marocca plants, while Mypore continues to to cultivate the plants. Gloryanna’s population is sick of making treks to Mypore just to purchase marocca, so the narrator and Hannah hope to capitalize on their desire by creating a shipping line between Gloryanna and Mypore.  Gloryanna has outlawed and eradicated the marocca plants, while Mypore continues to to cultivate them. Gloryanna’s population is sick of Myporians trying to sell marocca on their planet, so the narrator and Hannah hope to capitalize on the issue by bringing them to Gloryanna’s black market.  Gloryanna has outlawed and eradicated the marocca plants, while Mypore continues to cultivate the plants. Hannah and the narrator think they will be able to make an enormous profit by transporting and selling the plants to Gloryanna.