that is a pronoun. It stands for the pull . The sun's pull is twice (more than) the pull exerted by ...
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CalifJimthat is a pronoun. It stands for the pull.
The sun's pull is twice (more than) the pull exerted by ...
The use of that with this meaning is common in comparisons.
Compare:
Man's ability to reason is at least as good as that of a chimpanzee -- perhaps even greater. (that = the ability to reaso
Anonymousand no difference between 'more than twice that exerted..' and 'twice more than that exerted...' either?NO, they are different.