A manned spacecraft orbits a planet in an elliptical orbit. The astronaut on board wishes to escape from the planet and wishes to expendthe minimum amount of fuel possible in the single rocket burn required. At which pt of the orbit must he make the burn the appogee or the perigee?? Note: the rocket burn is made tangential to the spacecraft's orbital path and provides and instantaneous change in velocity. I think its the apogee as the gravitational force on the spacecraft is less than when its at the appogee. Any help would be appreciated.