Search this site or the web powered by FreeFind

Site search
Web search

Index
Home
Departments
Teachers
Students
Parents
High School
Middle School
Primary School
Administration
Contact Us
Sponsorship
Lists of Objects
Wikipedia
Journals
Space Journal
Crimson Publisher
Earth Sky
Organizations
IKCEST
NASA
Disaster Research Center
Data Stistics
Our World Data
United Nations
EM-DAT
Cosmos
Some graphics reproduced using Print Shop Deluxe, Broderbund Software, Inc. All Rights Reserved used by permission. The Classroom does not claim all descriptions of sites to be their own words. The Classroom  makes no promises or representations about the gadgets on this site as to quality. content or  performance

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
Articles Reports Videos Books
Articles Maps Videos Books
Online Resources
Tree Hugger Impact Simulator Wikipedia Comets
FloraTV Impact J.A. Marusek Wikipedia Asteroids
About.com Glossary NOVA Death Stars
How Stuff Works Live Science Seismic Activity
Sandia Lab.    
NASA Workshop on Impacts Earth Impact Effects Program  
BBC Asteroid impact scale BBC Close Shave...Asteroid  
NASA Danger of an asteroid? Lecture Notes by Bruce Walsh  
NASA Asteroid & Comet Impact Hazard
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.