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Pluto’s ‘‘desert’’ : Methane ice dunes on a glacier on an airless world

Date:
12 February 2019
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Event type:
Evening Meeting, Regional Group
Organised by:
East Midlands Regional Group
Venue:
British Geological Survey Keyworth
Event status:
EVENT CLOSED

Dr. Matt Telfer from the University of Plymouth will be presenting to the Regional Group on Pluto’’s ‘‘desert’’.

As well as the deserts of Earth, dunes have been identified on Venus, Mars and Saturn’s moon Titan. Tantalizingly dune-like features were described from the atmosphereless comet 67P Churyamov-Gerasimenko from the ESA’s Rosetta orbiter, but prior to New Horizon’s 2015 flyby of Pluto, so little was known of the geology of this world that predictions of its surface were extremely difficult. 

When images from Pluto revealed landforms startlingly similar to dunes from Earth’s deserts, the question of how it was possible to have dunes with an atmosphere only 1/100,000th that of Earth (~ 1 Pa) arises. Here we describe the spectral, spatial and image analysis, which, together with numerical modelling, solved this puzzle.

Time

Refreshments will be available from 6:30pm with the talk commencing at 7:00pm. All welcome.