Which of these star clusters is youngest? A) a cluster whose brightest main sequ

Question

Which of these star clusters is youngest? A) a cluster whose brightest main sequence stars arewhite B) a cluster whose brightest stars are red C) a cluster containing stars of all colors Which of these star clusters is the youngest? A) a cluster whose brighest main sequence stars arewhite B) a cluster whose brightest main sequence stars areyellow C) a cluster containing stars of all colors Which of these star clusters is youngest? A) a cluster whose brightest main sequence stars arewhite B) a cluster whose brightest stars are red C) a cluster containing stars of all colors Which of these star clusters is the youngest? A) a cluster whose brighest main sequence stars arewhite B) a cluster whose brightest main sequence stars areyellow C) a cluster containing stars of all colors

Explanation / Answer

The answer is A) because if the brightest stars were red thenthey would be farther down the main sequence. Which ofthese star clusters are the youngest? TheAnswer is A) because yellow main sequence stars are farther downthe line.

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