Where would you least expect to find an ionization nebula? o a. None of the abov

Question

Where would you least expect to find an ionization nebula? o a. None of the above. ob. in the halo. O C. in the disk d-in the spiral arms. QUESTION 11 4 points Save Answer What do we mean by a protogalactic cloud? o a the cloud-like halo that surrounds the disks of spiral galaxies b, a term o e used historically to refer to any galaxy O C. a cloud of hydrogen and helium that contracts to become a galaxy o d. a cloud of gas that was once a galaxy 4points ave Answer QUESTION 12 Which of the following statements is true: a. black holes cannot be seen because they are too far away O b. black holes cannot be seen, but we can sen the offects of their gravitational fields O C. None of the above ..Oda black hole is.a final staoe al a

Explanation / Answer

10. The answer is b=in the halo
It is an emission nebula which is formed by rthe ionized gases which emit various wavelengths of light and they arrmore common in disk and in spiral arms and very less in halo. This is because most of stars in halo are very very old.

11. The answer is c
Protogalactic cloud is a cloud of hydrogen and helium which has cotracted to become into a galaxy.

12.The answer is b=black holes cannot be seen by us but we can see the effects of their......
This is done by studying the matter nearby

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