space medium MCQ

The transit method detects exoplanets by observing which phenomenon?

  1. Stellar wobble
  2. Periodic dimming of starlight
  3. Direct imaging
  4. Gravitational lensing

Answer: Periodic dimming of starlight

When a planet passes in front of its host star, it blocks a tiny fraction of light, causing measurable brightness dips that reveal planet size and orbital period.

Topic Astronomy - Exoplanets
Exam Relevance SSC CGL, UPSC Prelims