Gravitational Microlensing Detects Planets When

question 41

Multiple Choice

Gravitational microlensing detects planets when:

• A)a background exoplanet passes almost directly behind its star.
• B)a massive exoplanet orbits close to its star.
• C)an exoplanet has an orbit that is perpendicular to our line of sight (face on).
• D)a foreground exoplanet passes almost directly in front of its star.

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