I hate to say "I told you so" (but I will anyway ), but some time ago I reported here that the most favored theory of how the Moon originated received that status not because it was such a good theory but instead because all of the other theories had been shown to have very serious deficiencies.
Here is an excerpt from an article in a recent Planetary Report:
"In many respects, our Moon is the best-studied body other than Earth.... If we have already learned so much, what do we expect to gain by going back? .... I argue ... that we really don’t understand the Moon very well, and that it is a body the understanding of which features prominently in our attempts to figure out what took place when the planets formed.
The Apollo program and subsequent research revealed that our Moon is an oddball.
What’s wrong with the standard story of the Moon that we need more explanation to fix the story? ... Part of the answer lies in something that often happens in science: we have a story that is widely accepted, but it is a story that is actually incomplete and poorly tested. To some extent, the so-called giant impact origin of the Moon has gained acceptance through the failure of alternatives rather than through its evident correctness.
Several alternatives to the impact origin have been proposed.... All these alternatives have very major and extensively studied shortcomings. This is, however, not the same as saying that we know for sure that the giant impact happened—it simply seems more likely than rival hypotheses."
Lunar Mysteries Beckon by Dave Stevenson - Planetary Report
Here is an excerpt from an article in a recent Planetary Report:
"In many respects, our Moon is the best-studied body other than Earth.... If we have already learned so much, what do we expect to gain by going back? .... I argue ... that we really don’t understand the Moon very well, and that it is a body the understanding of which features prominently in our attempts to figure out what took place when the planets formed.
The Apollo program and subsequent research revealed that our Moon is an oddball.
What’s wrong with the standard story of the Moon that we need more explanation to fix the story? ... Part of the answer lies in something that often happens in science: we have a story that is widely accepted, but it is a story that is actually incomplete and poorly tested. To some extent, the so-called giant impact origin of the Moon has gained acceptance through the failure of alternatives rather than through its evident correctness.
Several alternatives to the impact origin have been proposed.... All these alternatives have very major and extensively studied shortcomings. This is, however, not the same as saying that we know for sure that the giant impact happened—it simply seems more likely than rival hypotheses."
Lunar Mysteries Beckon by Dave Stevenson - Planetary Report
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