Assertion: comet's amount | /r/CapableOf | explain the absence of visible coma
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text: Heat diffusion during the stellar tidal disruption process also consumes large amounts of volatiles, which not only explains ‘Oumuamua’s surface colors and the absence of visible coma, but also elucidates the inferred dryness of the interstellar population,” Zhang said.
text: Heat diffusion during the stellar tidal disruption process also consumes large amounts of volatiles, which not only explains 'Oumuamua’s [reddish] surface colors and the absence of visible coma but also elucidates the inferred dryness of the interstellar population," Zhang said.