IAO 1998, Теория, 14–16 години — Задача 4
III International Astronomy Olympiad
Условие
Suppose that the Sun collapsed suddenly to a black hole. How would the Earth's orbital period be affected?
Решение
If the Sun does not eject mass and does not irradiate gravitational waves during the collapse, its mass doesn't change. So the Earth orbit doesn't change either.
Оригинал в Архива: en1.jpg · официални решения: theosol.jpg