21st Century Astronomy 6E
21st Century Astronomy 6E
6th Edition
ISBN: 9780393690675
Author: Laura Kay, Stacy Palen, George Blumenthal
Publisher: W. W. Norton
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Chapter 15, Problem 1QP
To determine

The phases of interstellar medium include.

Expert Solution & Answer
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Answer to Problem 1QP

Option (a),(b) and (d).

Explanation of Solution

Interstellar medium is the matter exists between the star systems in the galaxy includes dusts, gases and molecular form, cosmic rays and so on.

The dense region in the interstellar medium is very prone to the formation of the stars. As it is very dense the pressure in this region is too high.

As the pressure increases, temperature also increases and hence there is seldom possibility of existence of hot gas in high dense state and other combinations are possible.

Conclusion:

The all possible combinations can be a phase of interstellar medium except the high dense gas at high temperature. Thus, option (a), (b) and (d) are correct.

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