How many theories exist about how the moon formed?
Up until about the 1990s, there were at least 3 major theories as to how the moon formed. All of them turned out to be wrong!
The theories surrounding the formation of the Moon began to shift when several hundred pounds of moon rocks were returned by the Apollo missions in the 1970s.
There were other proto-planets forming as well; one of these, called Theia, was thought to be forming close to Earth's orbit; however, since no two planets can occupy the same orbit, when the smaller proto-planet struck Earth some sort of blow, the Earth absorbed most of this earlier planet and spat out the remains, which became our moon. Today, most scientists are quite confident that "the big splat" or "big thwack" is probably the most likely one.
View the video here:
The video on the Moon's formation from a massive collision with young Earth can be found here.
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There are several theories about how the Moon formed, including the Giant Impact Hypothesis, the Co-Accretion Theory, the Capture Theory, and the Fission Theory.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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