Electrostatic and gravitational forces are similar in many ways. So why are there no "gravitational dipoles" the same way there are electric dipoles?
That would need negative masses, which don't exist.
That would require the two masses to be a negative distance apart, which makes no sense.
The gravitational attraction between two particles is far too weak to allow them to form dipoles.
Answer- The gravitational attraction between two particles is far too weak to allow them to form dipoles.
Electric dipoles consists of two charges having opposite sign and separated by some distance. Distance is positive and charges have opposite sign for attraction but in case of gravitational dipole we don't need opposite sign condition, since masses always attract due to gravity. Hence only possible reason for non-existance of gravitational dipole is that the gravitational attraction between two particles is far too weak to allow them to form dipoles.
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