Dating the Moon-forming impact event with asteroidal meteorites-Reference-Cited by-同舟云学术

Dating the Moon-forming impact event with asteroidal meteorites

Published:2015-04-17 Issue:6232 Volume:348 Page:321-323
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Bottke W. F.¹,Vokrouhlický D.²,Marchi S.¹,Swindle T.³⁴,Scott E. R. D.⁵,Weirich J. R.⁶,Levison H.¹

Affiliation:

1. Southwest Research Institute and NASA Solar System Exploration Research Virtual Institute (SSERVI)–Institute for the Science of Exploration Targets (ISET), Boulder, CO, USA.

2. Institute of Astronomy, Charles University, V Holešovičkách 2, CZ-18000, Prague 8, Czech Republic.

3. Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA.

4. SSERVI Center for Lunar Science Exploration, Houston, TX, USA.

5. Hawai’i Institute of Geophysics and Planetology, University of Hawai’i at Manoa, Honolulu, Hawai’i 96822, USA.

6. Department of Earth Sciences, Western University, London, ON, Canada.

Abstract

Traces of collisions within collisions The Moon is widely accepted to have been created by the collision of a Mars-sized body with Earth. However, information about exactly when this event occurred is still welcome. To find out more, Bottke et al. compared models and the meteorite record with estimates of impact heating. When ejecta was thrown off during the main collision, high-velocity kilometer-sized fragments hit and heated main-belt asteroids. Evidence of such collisions emerges when pieces of those asteroids turn up as meteorites on Earth. The model and empirical record converge on 4.48 billion years ago, confirming previous estimates reached by different approaches. Science , this issue p. 321

Funder

NASA

Czech Grant Agency

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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