Considering the uniqueness of this special mission many changes were incorporated in the space craft. This was not a usual mission for space exploration to farfetched planetary bodies. The possibility of fighting with aliens was rare even then the space craft was loaded with nuclear missiles, electronic machineguns, laser guns etc. This was an orbital space flight. Space scientists were worried about changes in the gravitational force of the earth due to its slow rotational speed. This may cause trouble for the mission of the space craft.