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Cosmic Disasters of Near-Earth Objects

Cosmic Disasters
Cosmic Disasters: The likelihood of destruction due to meteors, comets or asteroids hitting the earth.
"What are the odds that an asteroid impact will destroy your being in a given year? Slim -- 1 in 74,817,414, according to data compiled by The Economist." Read More C/Net
"Asteroids with a 1 km (0.62 mi) diameter strike Earth every 500,000 years on average. Large collisions – with 5 km (3 mi) objects – happen approximately once every twenty million years. The last known impact of an object of 10 km (6 mi) or more in diameter was at the Cretaceous–Paleogene extinction event 66 million years ago." Read More Wikiedia
Geography Natural Disasters Disaster  Astronomy  Science  Earth Science   
Geography Natural Disasters  Disasters Astronomy  Science  Earth Science   
Online Books
Cosmic Collisions by Dana Desonie
Our Cosmic Future: Humanity's Fate in the Universe
The Hammer of God by Arthur Charles Clarke
Online Resources
Tree Hugger How Stuff Works Earth Impact Effects Program BBC Close Shave with Asteroid
FloraTV Sandia Laboratory Wikipedia Comets BBC Asteroid impact scale
About.com Impact Simulator Wikipedia Asteroids NOVA Death Stars
Impact J.A. Marusek NASA Workshop on Impacts NASA Danger of being hit by an asteroid?
Live Science Lecture Notes by Bruce Walsh NASA Asteroid & Comet Impact Hazard
National Aeronautics and Space Administration
Newly Released Map Data Shows Frequency of Small Asteroid Impacts, Provides Clues on Larger Asteroid Population.
NASA Planetary Defense Coordination Office
Observations Program is responsible for finding, tracking, and characterizing near-Earth objects- asteroids and comets whose orbits periodically bring them within approximately 1.3 Astronomical Units (AU) of the Sun.