| 1. | :Why they travel in elliptical / circular orbits is because of gravity.
|
| 2. | This is equal to the radius of the Earth's roughly circular orbit.
|
| 3. | At the time, astronomers knew only of planets with fairly circular orbits.
|
| 4. | This is incorrect, except in the special case of a circular orbit.
|
| 5. | A circular orbit certainly has that property-but so does an elliptical one.
|
| 6. | The solution ? = 0 corresponds to perfectly circular orbits, as noted above.
|
| 7. | The magnitude of the angular momentum for a circular orbit is:
|
| 8. | Where " R " is the average radius of the nearly circular orbit.
|
| 9. | Circular orbits smaller than " r " s are not possible.
|
| 10. | The spacecraft is operating in a circular orbit 200 miles above the planet.
|
