Translation of fantasy book Third Planet's Secret

She just finished her second year of school and a holiday had began. She had already taken a trip to other places on Earth and took a trip even to Mars and Venus but she hadn't been to far planets yet.
Alice, her father, and Captain Green are staying near by the Pegasus and watching the robots load a food and equipments they will need in the expedition on the spaceship. 

Captain Green was very angry about the spaceship being overweight and he didn't know if it could rise. He was muttering that he would resign himself to growing roses but nobody paid attention to his muttering because Captain Green was a pessimist, i.e. he waits for something bad to happen.