Earth-impacting

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• Structure of the Earth — Earth cutaway from core to exosphere. Left picture is not to scale. The interior structure of the Earth, similar to the outer, is layered. These layers can be defined by either their chemical or their rheological properties. The Earth has an… …   Wikipedia

• Geological history of Earth — impacting the Earth in a glancing blow. [cite journal | last = R. Canup and E. Asphaug | title = Origin of the Moon in a giant impact near the end of the Earth s formation | journal = Nature | volume = 412 | pages = 708–712 | date = 2001 | url =… …   Wikipedia

• Rare Earth hypothesis — In planetary astronomy and astrobiology, the Rare Earth hypothesis argues that the emergence of complex multicellular life (metazoa) on Earth required an improbable combination of astrophysical and geological events and circumstances. The term… …   Wikipedia

• History of the Earth — For the history of modern humans, see History of the world. Geological time put in a diagram called a geological clock, showing the relative lengths of the eons of the Earth s history The history of the Earth describes the most important events… …   Wikipedia

• Apollo 15, Return to Earth — After the Apollo 15 Lunar Module Falcon lifted from the lunar surface it rendezvoused and docked with the Command/Service Module Endeavour . After transferring across the lunar samples and other equipment, Falcon was jettisoned. It would fire its …   Wikipedia

• Village Earth — Infobox Non profit Non profit name = Consortium for Sustainable Village Based Development AKA: Village Earth founded date = 1993 founder = Maurice L. Albertson, Edwin F. Shinn, Miriam Shinn location = Fort Collins, CO area served = Worldwide… …   Wikipedia

• Impact event — Artist s impression of a major impact event. The collision between Earth and an asteroid a few kilometers in diameter may release as much energy as several million nuclear weapons detonating simultaneously. An impact event is the collision of a… …   Wikipedia

• Asteroid deflection strategies — are methods by which near Earth objects could be diverted, preventing potentially catastrophic impact events. A sufficiently large impact would cause massive tsunamis and/or, by placing large quantities of dust into the stratosphere blocking… …   Wikipedia

• Asteroid-impact avoidance — Planetary defense redirects here. For defending against alien invasion in fiction, see alien invasion. Artist s impression of a major impact event. The collision between Earth and an asteroid a few kilometres in diameter releases as much energy… …   Wikipedia

• 2008 TC3 — mp|2008 TC|3 (Catalina Sky Survey temporary designation 8TA9D69) was a meteoroid convert|2|to|5|m|ft|0|sp=us in diameter that entered Earth s atmosphere on October 7, 2008, at 02:46 UTC (5:46 a.m. local time) and burned up without making physical …   Wikipedia

• George Wetherill — (August 12, 1925 July 19, 2006) was the Director Emeritus, Department of Terrestrial Magnetism, Carnegie Institution of Washington, DC, USA.George Wetherill benefited from the G.I. Bill to receive four degrees, the Ph. B. (1948), S.B. (1949), S.M …   Wikipedia