To determine which planet would gravitationally attract the spacecraft the least, we can compare the mass of each planet. The gravitational attraction between two objects is proportional to their masses.
The estimated masses of the planets are as follows (in \(10^{24}\) kg):
- Venus: 4.87
- Mars: 0.642
- Jupiter: 1,898.0
- Neptune: 102.0
Since gravitational attraction is directly related to the mass of the planet, the planet with the smallest mass will exert the least gravitational attraction.
In this case, Mars has the lowest mass (0.642 \(10^{24}\) kg), which means it will attract the spacecraft the least compared to the others.
Answer: Mars
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