space medium MCQ

Shepherd moons maintain planetary ring gaps through which mechanism?

  1. Magnetic confinement
  2. Gravitational resonances
  3. Electrostatic forces
  4. Radiation pressure

Answer: Gravitational resonances

Small moons like Prometheus and Pandora gravitationally confine Saturn's F ring, preventing particle dispersion through orbital resonances.

Topic Solar System - Rings
Exam Relevance SSC CGL, UPSC Prelims
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