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SUMMARY:Catching Comets by their Tails - Professor Geraint Jones
DTSTART:20190312T193000Z
DTEND:20190312T210000Z
UID:TALK117928@talks.cam.ac.uk
CONTACT:Hannah Sanderson
DESCRIPTION:When a comet nears the Sun\, volatile materials near the surfa
 ce of its nucleus sublimate\, releasing gas\, which carries dust grains in
 to space that are pushed away from the Sun by the pressure of sunlight alo
 ne. The gaseous atoms and molecules are ionized through several processes.
  The ions then join the solar wind that flows outwards from the Sun\, and 
 are visible as the comet’s ion tail. In this presentation\, the formatio
 n\, appearance\, and structure of both ion and dust tails will be covered.
  Much of what has been learnt about these tails derives from unexpected ta
 il crossings by spacecraft not targeted at comets\, sometimes occurring at
  huge distances from the comets’ heads. An overview of these unexpected 
 crossings will be provided\, and how more of these events are being sought
 . Finally\, the proposed Comet Interceptor mission is presented. If approv
 ed\, this European Space Agency project will involve an encounter with a c
 omet nearing the Sun for the first time since the solar system's formation
 . If a suitable target is found\, the spacecraft could even visit an inter
 stellar object.\nThe talk will be followed by refreshments outside the lec
 ture theatre.\nThe talk will be at 7:30pm at the usual location of Wolfson
  lecture theatre in the Department of Chemistry. The entrance is the oppos
 ite side of the building to Bristol-Myers-Squibb Lecture theatre and is op
 posite the car park- shown by the red arrow on the map. "https://map.cam.a
 c.uk/Department+of+Chemistry#52.197964\,0.125242\,18":UR\nTickets are £2 
 (free for members) and annual membership (£7) and life membership (£12) 
 can also be purchased at the event - please bring cash.\n
LOCATION:Wolfson Lecture Theatre\, Department of Chemistry
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