How does the launch requirement for a massive interplanetary probe contrast with that for smaller research vehicles?
Answer
Interplanetary probes need extremely high-energy trajectories, while smaller vehicles might hitch rides to lower orbits.
The launch methodology is tailored to the mission's needs; sending a massive probe out of the solar system requires rare, high-energy capability, whereas smaller research craft often share rides on vehicles heading to more accessible, lower orbits.

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