The lunar highlands appear brighter than the mare, because these highlands are due to meteor impact that completely avoided the mare.

Question

Quizplus · Accepted Answer

The lunar highlands appear brighter than the mare primarily because they are composed of anorthosite, which is a lighter-colored rock, whereas the mare are filled with basalt, a darker rock. The difference in color is not due to meteor impacts avoiding the mare but rather the composition of the rocks and the age of the surfaces.

The Lunar Highlands Appear Brighter Than the Mare, Because These