The characteristics of an open cluster of stars are:
A) a few hundred members, often very young and still embedded in the gas and dust from which they were formed.
B) hundreds of thousands of members, all very old, surrounded by very little interstellar gas and dust.
C) a few dozen members, the remnant of a globular cluster of stars from which most of the members have escaped.
D) many thousands of members of different ages.
Correct Answer:
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