Collapsing cliff reveals comet’s interior / Rosetta / Space Science / Our Activities / ESA
▻http://www.esa.int/Our_Activities/Space_Science/Rosetta/Collapsing_cliff_reveals_comet_s_interior
Rosetta scientists have made the first compelling link between an outburst of dust and gas and the collapse of a prominent cliff, which also exposed the pristine, icy interior of the comet.
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The event also provided a unique opportunity to study how the pristine water-ice otherwise buried tens of metres inside the comet evolved as the exposed material turned to vapour over the following months.
Indeed, after the event, the exposed cliff face was calculated to be at least six times brighter than the overall average surface of the comet nucleus. By 26 December 2015 the brightness had faded by half, suggesting much of the water-ice had already vapourised by that time.
And by 6 August 2016, most of the new cliff face had faded back to the average, with only one large, brighter block remaining.
Comet cliff collapse in 3D