USAAAO 2018, I кръг — Задача 15
USAAAO National Astronomy Olympiad First Round 02/12/2018-02/16/2018 Time Limit: 75 Minutes · 12 февруари 2018 г. · 1 т.
Внимание: Бележка към темата
The solutions document provides answer letters for all 30 problems and brief explanations for some problems.
Условие
Which of the following stages will our Sun not evolve through?
A. Red giant
B. White dwarf
C. Cepheid variable
D. Planetary nebula
E. Main sequence
Решение
Answer: C
Our Sun is not massive enough to encounter the Cepheid instability strip in the H-R diagram.
Оригинал в Архива: usaaao-first-round-exam-2018.pdf · официални решения: usaaao_first_round_2018.pdf