21st Century Astronomy
21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 17, Problem 7QP
To determine

The correct option in which the H-R diagram of the globular cluster would fall if the Sun were part of it.

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The sketch below shows an H-R diagram for a star cluster. Consider the star to which the arrow points. How is it currently generating energy? Temperature A. by hydrogen shell burning around an inert helium core B. by gravitational contraction C. by core hydrogen fusion D.by core helium fusion combined with hydrogen shell burning E. by both hydrogen and helium shell burning around an inert carbon core Luminosity -→
Star clusters are important to our study of stars because   a. all stars formed in star clusters.   b. the sun was once a member of a globular cluster.   c. they give us a method to test our theories and models of stellar evolution.   d. they are the only objects that contain Cepheid variables.   e. all of the above are true.
The theory that the collapse of a massive star’s iron core produces neutrinos was supported by   a. the size and structure of the Crab nebula.   b. laboratory measurements of the mass of the neutrino.   c. the brightening of supernovae a few days after they are first visible.   d. underground counts from solar neutrinos.   e. the detection of neutrinos from the supernova of 1987.
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