introduction
From the space venture point of view, the gravity assist technique used by a passing spacecraft to gain relative velocity is at the heart of where planetary motion tutelage should be. The technique would not work if the inverse square law of Jupiter, for example, was considered to be fixed in space in the way Galileo and Sir Isaac Newton considered the sun's inverse square law to be fixed in space.
From the space venture point of view, the gravity assist technique used by a passing spacecraft to gain relative velocity is at the heart of where planetary motion tutelage should be. The technique would not work if the inverse square law of Jupiter, for example, was considered to be fixed in space in the way Galileo and Sir Isaac Newton considered the sun's inverse square law to be fixed in space.