Studying for my astronomy final and would like conformation on my anser
Compared to older clusters, the younger clusters have more of their stars?
A. Cooler than the Sun
B. In the Red Giant phase
C. On the Main Sequence
D. With Luminosities less than the sun
I would say C because older star clusters would have stars that have left the main sequence and are currently in the red giant phase, am I correct?
Compared to older clusters, the younger clusters have more of their stars?
A. Cooler than the Sun
B. In the Red Giant phase
C. On the Main Sequence
D. With Luminosities less than the sun
I would say C because older star clusters would have stars that have left the main sequence and are currently in the red giant phase, am I correct?
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In general you are right based on the evolution of a star from its initial development as a proto-star to its state in old age. You maybe should make a distinction between globular clusters and open clusters. Globular clusters are typically old with many of their constituent stars having evolved beyond the Main Sequence of the Hertzsprung–Russell Diagram.
Open clusters are frequently populated by much younger stars. Having few stars and looser construction, such clusters tend to disassociate relatively quickly and before the stars have achance to move off the Main Sequence.
You can read more details on star clusters at: http://en.wikipedia.org/wiki/Star_cluste…
Good luck on the test.
Open clusters are frequently populated by much younger stars. Having few stars and looser construction, such clusters tend to disassociate relatively quickly and before the stars have achance to move off the Main Sequence.
You can read more details on star clusters at: http://en.wikipedia.org/wiki/Star_cluste…
Good luck on the test.
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Yes. Most of astronomy is just simple logic. Stars move off the main sequence as they grow old, with the more massive stars going off first.
Of course, in your question (and in your answer), you are assuming that both clusters (the young one and the old one) produced stars of various sizes in the same proportion - and that is usually true for cluster formed from similar clouds.
The answer would become less certain if you were talking of very different types of clusters, from very different types of clouds (an extremely large, cold, metal-poor cloud, versus a smaller, warm and metal-rich cloud). But since the question does not talk about any difference, then we are allowed to make the assumption that both cluster were made from similar clouds (which is what we assume, in real life observations).
Of course, in your question (and in your answer), you are assuming that both clusters (the young one and the old one) produced stars of various sizes in the same proportion - and that is usually true for cluster formed from similar clouds.
The answer would become less certain if you were talking of very different types of clusters, from very different types of clouds (an extremely large, cold, metal-poor cloud, versus a smaller, warm and metal-rich cloud). But since the question does not talk about any difference, then we are allowed to make the assumption that both cluster were made from similar clouds (which is what we assume, in real life observations).
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Amazing! Here: http://styleasy.info/445332/phase