Multiple Choice
Which of these exoplanet characteristics is MOST difficult to explain with the Nice model of planetary system formation?
A) Exoplanets that orbit in an opposite direction from their star's rotation.
B) Gas giants with orbits smaller than Mercury.
C) The relative proportion of gas giant and terrestrial planets in exoplanet systems.
D) The existence of free-floating planets.
Correct Answer:
Verified
Correct Answer:
Verified
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