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| 1 | |
What do the orbits of planets and satellites tell us about the rotation of the cloud that formed the solar system? |
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| 2 | |
Why are radio and infrared radiation more useful than visible light in studying molecular clouds? |
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| 3 | |
Describe the structure of a giant molecular cloud. |
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| 4 | |
What evidence do we have that stars form in the cores of giant molecular clouds? |
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| 5 | |
Suppose there were no magnetic fields in interstellar space. What effect might this have on the number of young stars in the galaxy? |
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| 6 | |
Why does a collapsing cloud remain cool as long as it is transparent, but begin to heat up when it becomes opaque? |
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| 7 | |
What halts the collapse of a protostar? |
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| 8 | |
What happens to the shape of a protostar as it collapses? Why does this change in shape occur? |
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| 9 | |
Where in an H-R diagram are young stars located when they first become observable using visible light? Why aren't they visible at an earlier stage of their careers? |
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| 10 | |
What evidence do we have that young stars are surrounded by dusty disks rather than complete spherical shells of dust? |
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| 11 | |
What role does friction play in determining the distribution of matter and angular momentum within rotating disks about young stars? |
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| 12 | |
What is the relationship between Herbig-Haro objects and jets of gas from young stars? |
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| 13 | |
How do we know that the formation of the solar system took place in only about 100 million years? |
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| 14 | |
How is it possible to estimate the mass of the solar nebula? |
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| 15 | |
Describe the steps in the process through which microscopic solid grains accumulated to form objects a few thousand kilometers in diameter. |
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| 16 | |
What evidence do we have that the planets formed as a result of collisions of planetesimals? |
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| 17 | |
What evidence do we have that the final stage of the formation of the solar system consisted of collisions between planet-sized objects? |
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