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Near-Earth asteroids: Their physical nature and the impact hazard

Harris, Alan (2005) Near-Earth asteroids: Their physical nature and the impact hazard. Colloquium, 2005-06-01, Max-Planck-Institut fuer Sonnensystemforschung, Katlenburg-Lindau, Germany.

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Abstract

Collisions between planetesimals, the precursors of present-day asteroids and comets, and growing planets forged the Solar System as we know it today. After the epoch of planet formation around 4.5 billion years ago, collisions with the remnant population of small bodies continued and probably led to significant quantities of minerals, water and organic materials being deposited on the surfaces of the Earth and other planets. In later epochs impacts on the Earth may have abruptly altered the course of evolution and paved the way for mankind. However, mankind should now be aware that this natural process has not ceased. In particular the current population of so-called near-Earth asteroids contains many objects that are considered potentially hazardous. I will discuss the origin of near-Earth asteroids, recent observational results relating to their physical properties, and steps being taken to improve our understanding of the impact hazard and determine what defensive measures are appropriate.

Document Type:Conference or Workshop Item (Speech)
Title:Near-Earth asteroids: Their physical nature and the impact hazard
Authors:
AuthorsInstitution or Email of Authors
Harris, AlanUNSPECIFIED
Date:1 June 2005
Status:Published
Keywords:Asteroids, near-Earth objects
Event Title:Colloquium
Event Location:Max-Planck-Institut fuer Sonnensystemforschung, Katlenburg-Lindau, Germany
Event Type:Other
Event Dates:2005-06-01
Organizer:Max-Planck-Institut fuer Sonnensystemforschung
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):W - Vorhaben Asteroiden und Kometen (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Prof. Alan Harris
Deposited On:13 Dec 2005
Last Modified:27 Apr 2009 04:45

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