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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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