Mascons, or concentrations of high-density material detected by their effect on the orbits of spacecraft, appear to be coincident with which features on the Moon's surface?
A) north and south polar regions that are never sunlit
B) new craters surrounded by radially aligned lighter markings
C) highest mountain ranges on the lunar surface
D) large maria

Question

Quizplus · Accepted Answer

Mascons, or mass concentrations, are found beneath the Moon's large maria, which are vast, dark plains formed by ancient volcanic eruptions. These areas have higher gravity due to dense materials beneath the surface, affecting spacecraft orbits.

Mascons, or Concentrations of High-Density Material Detected by Their Effect