Earth Changes: Near Earth Asteroids

Near Earth Asteroids,  Meteoroids, Comets with Potential Problems

Was it really an asteroid a few miles wide, that completely wiped out the dinosaurs? According to data, the answer is YES! In the last 100 years man has taken to the skies to find our planet is pock-marked with huge craters, just like the moon. We are bombarded daily with small space debris and it's only newsworthy when such debris hits a house or a car. Only 10% of all near earth asteroids have been cataloged. New potential dangers are discovered at an alarming rate. Also within our or our children's lifetimes major astronomical events will become known, according to scientific data which is readily online. Some of these near earth asteroids are the size which has taken out entire species such as the one in the Yucatan Peninsula! Comets, large meteors all pose a hazard to humanity if earth manages to cross their paths.

Rendition of a Major Costal City Flooded by an Asteroid Hit
Extinction of a Species?	A Rendition of  The Tunguska Comet/ Meteor Explosion in Russian Siberia in June 1908
Links to  Comet /Asteroid's in our Past
The Yucatan  Explosion	The Tunguska Comet/ Meteor Explosion
http://minorplanetcenter.net/blog/

Below, you can monitor potentially devastating near-earth events as they unfold or read about past ones.

This three-dimensional map of local gravity and magnetic field variations shows a multi-ringed structure called Chicxulub named after a village located near its center. The impact basin is buried by several hundred meters of sediment, hiding it from view. This image shows the basin viewed obliquely from approximately 60° above the surface looking north, with artificial lighting from the south. The image covers 88 to 90.5° west longitude and 19.5 to 22.5° north latitude. NASA scientists believe that an asteroid 10 to 20 kilometers (6 to 12 miles) in diameter produced this impact basin. The asteroid hit a geologically unique, sulfur-rich region of the Yucatan Peninsula and kicked up billions of tons of sulfur and other materials into the atmosphere. Darkness prevailed for about half a year after the collision. This caused global temperatures to plunge near freezing. Half of the species on Earth became extinct including the dinosaurs.
Asteroid 951 Gaspra	Gaspra is an irregularly shaped body and rotates counterclockwise once every 7 hours. The  shown here is slightly under 12 miles in diameter
The frame is about .8 miles from top to bottom.  It is about  36 miles  along in it's axis.	Asteroid 243 Ida

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03/05/12 03:49 PM