Space probes now asks for a correction in aeronautic mechanics. Analysis of the radio tracking data from the Pioneer 10/11 spacecraft at distances between about 20–70 AU from the Sun has consistently indicated the presence of a constant acceleration of 8.6× 10−8 cm/s−2 directed towards the Sun. Currently, an independent research rises from the planetary long-term orbital evolution study and may be helpful to understand the nature of Pioneer Anomaly. Furthermore, calculation shows that the Pioneer data match with the new discovery’s prediction very well. Such nova theory will improve spacecraft and space shuttle design, and could enhance the accuracy, ensuring them into the designed orbit prompt.