What may have contributed to the major impacts on the Moon and other objects 3.9 billion years ago?
A)Encounters of Uranus and Neptune with Trans-Neptunian objects as Uranus and Neptune moved farther outward in their orbits.
B)Encounters of Uranus and Neptune with Trans-Neptunian objects as Uranus and Neptune moved farther inward in their orbits.
C)Encounters of Jupiter and Saturn with Trans-Neptunian objects as Jupiter and Saturn moved farther outward in their orbits.
D)Encounters of Jupiter and Saturn with Trans-Neptunian objects as Jupiter and Saturn moved farther inward in their orbits.

Question

Quizplus · Accepted Answer

Encounters of Uranus and Neptune with Trans-Neptunian objects as they moved outward in their orbits could have disturbed the orbits of these objects, leading to increased impacts on the Moon and other bodies in the inner solar system.

What May Have Contributed to the Major Impacts on the Moon