Assuming you are talking about the car part and not the astronomical event:
The jack is located in the trunk of the car. There is a small compartment that it fits into on the driver's side. To remove it, first, remove the spare tire. There should be a handle that you can turn to loosen the tire. Once the tire is removed, the jack will be visible. There is a handle on the jack that you can use to remove it from the compartment.