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UID:UW-Physics-Event-6589
DTSTART:20210930T203000Z
DTEND:20210930T220000Z
DTSTAMP:20260414T191920Z
LAST-MODIFIED:20210830T134403Z
LOCATION:4421 Sterling Hall\, Coffee and Cookies 3:30 pm\, Talk starts
  at 3:45 pm
SUMMARY:Reassessing Impact Bombardment in the Earth-Moon System\, Astr
 onomy Colloquium\, Nicolle Zellner\, Albion College
DESCRIPTION:The characteristics of the impact flux in the Earth-Moon s
 ystem\, especially during the first 700 million to 1 billion years of 
 Earth’s history\, have been debated by scientists for decades. In pa
 rticular\, after analyses of lunar impact samples\, uncertainties arou
 nd its profile have persisted: did the impact flux taper off after fin
 al planetary accretion and sweep-up of debris or was there a short-liv
 ed influx of impactors at ~3.9 billion years ago? As Earth’s nearest
  neighbor\, the Moon’s impact flux is applied to Earth\, as well as 
 to other planetary bodies in the inner solar system. Advances in acqui
 ring\, analyzing\, and interpreting lunar (and other) data are allowin
 g us to refine our interpretations of the nature and extent of the imp
 act flux\, from shortly after the solar system formed to the present. 
 These data are allowing us to better understand how impacts may have i
 nfluenced (or not) Earth’s biological and geological activities and 
 permit us to also speculate on how it may have affected Mars.
URL:https://www.physics.wisc.edu/events/?id=6589
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