Moon Sphere of Influence (MSI)

Recently, ISRO announced that the Chandrayaan-3 Propulsion Module (PM) has entered the Moon Sphere of Influence (MSI) during its ongoing extended mission operations.

  • The term “Moon Sphere of Influence” refers to the region around the Moon where the Moon’s gravitational pull becomes dominant over Earth’s gravity, thereby controlling the motion of nearby spacecraft.
  • It means that any object entering this region, such as a spacecraft, begins to follow trajectories primarily governed by the Moon’s gravity rather than Earth’s.
  • The Propulsion Module continues to orbit under the combined gravitational influence of Earth and Moon after being placed in a high-altitude Earth-bound ....
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