Input (grade 4): From Remus, the inner moon, Sylvia appears huge, roughly 30 ° × 18 ° across, while its view of Romulus varies between 1.59 and 0.50 ° across.
Output (grade 4): From Remus, the closer moon, Sylvia appears very big, about 30 ° × 18 ° across, while its view of Romulus varies between 1.59 and 0.50 ° across.