"Then we have already passed the zone of the telescopic planets, have we not?" asked the count.
"Can you not use your eyes?" said the professor, testily. "If you will look you will see the zone marked clearly enough upon the map."
Without noticing the interruption, Servadac continued his own remarks, "The comet then, I see, is to reach its aphelion on the 15th of January, exactly a twelvemonth after passing its perihelion."
"A twelvemonth! Not a Gallian twelvemonth?" exclaimed Rosette.
Servadac looked bewildered. Lieutenant Procope could not suppress a smile.
"What are you laughing at?" demanded the professor, turning round upon him angrily.
"Nothing, sir; only it amuses me to see how you want to revise the terrestrial calendar."
"I want to be logical, that's all."