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Whether a charged particle radiates in a gravitational field tests gravity's nature because if gravity were a Newtonian force a free-falling (accelerating) charge would emit radiation, but in general relativity a free-falling charge is inertial and shouldn't radiate while a stationary, ground-accelerated charge should.
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See all →Large amounts of moondust raining through the atmosphere would convert kinetic energy into heat—potentially heating and even boiling surface waters—while persistent ring shadows and volcanic/meteoric aerosols would reflect sunlight and trigger rapid cooling, so the net climate effect depends on the balance and timing of heating versus sunlight blockage.
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