IAO 1998, Теория, 16–18 години — Задача 5
III International Astronomy Olympiad
Условие
Same as for the 14–16 years old students.
Is it possible the lunar Mare Crisium whose diameter is , to be resolved by naked eye?
Решение
The Moon diameter is , and the visible angular diameter of the lunar disk is . Therefore, the maximum visible diameter of the Mare Crisium is
This is 3–5 times more than the angular resolution limit of a naked eye. Indeed, good observers can see the Mare Crisium, that was proofed by the pretelescopic draws of the Moon.
Оригинал в Архива: en1.jpg · официални решения: theosol.jpg