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mindviews comments on Open Thread June 2010, Part 4 - Less Wrong
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No, what's happening is that under certain approximations the two are described by similar math. The trick is to know when the approximations break down and what the math actually translates to physically.
No.
Keep in mind that for EM there are 2 charges while gravity has only 1. Also, like electric charges repel while like gravitic charges attract. This messes with your expectations about the sign of an interaction when you go from one to the other. That means your intuitive understanding of EM doesn't map well to understanding gravity.
True, but what got me the most interested is the gravitic analog of magnetic fields. It shows that masses can produce something analogous to magnetism by their rotation. Rotate one way, you drag the object closer; rotate the other way, you push it away. This allows both attraction and repulsion in the equations for gravity, and suggests something similar is going on that generates magnetism.