When
worlds collide...
Terrestrial
Impact
Craters
Answers to frequently
asked
questions concerning potential asteroid and comet impacts
The Planetary Society's Near-Earth
Objects Homepage
JPL's Near-Earth Objects
Homepage
Meteors,
Meteorites,
and Impacts
The American
Meteor
Society
A table of current
impact
risks for some Near Earth Asteroids
A table
of near-Earth encounter dates with potentially hazardous asteroids
Forthcoming Close
Approaches
To The Earth
Close
Approaches To The Earth (1900-2178)
1908
SIBERIA
EXPLOSION: Reconstructing an Asteroid Impact from Eyewitness
Accounts
Here
and here
are two more discussions of the Tunguska `impact' of 1908
Asteroid and Comet
Impact Hazards
Asteroid Radar Research
SOLAR SYSTEM COLLISIONS: a simple
destruction
calculator
Earth Impact
Effects
Program: plug in the impactor, and program gives detailed accounts
of
the resulting destruction
Another
website that makes detailed predictions of impact craters,
including dimensions, lip, ejecta, melt, and much more. This one
is all set up for lunar impacts. And this one
is pretty darned cool, too.
Impact Earth! A
way cool simulator from Purdue University and Imperial College
London.
Finding
&
tracking the dangerous ones: Near Earth Asteroid Tracking
Asteroid and Comet
Impact
Hazards
Canadian
Meteorite and Impacts Advisory Committee
The Barringer Crater
Homepage
Gary
Ferland's
page on those objects that occasionally hit the Earth...
Supercomputer
simulations of a comet or meteor impacting the Earth off Long
Island; link to
the animation of simulation
The American Meteor
Society - a good list of FAQs on fireballs
and falling meteors
Links
to
Organizations and network resources on Near Earth Asteroids
SpaceWatch Project
at LPL, University of Arizona
A daily
updated map of known asteroids and comets in the inner solar
system, and some
gif animations of their motions

GIF file animation courtesy of JPL/NEA. Note: the distances
to
sufficiently large asteroids can also be determined via the reflection
of
radio waves (radar ranging).
Last Updated on 4 January 2011
By
Kirk Korista
Professor of Astronomy
Department of Physics
Western Michigan University