NATS 1560 Lecture Notes - Lecture 15: Allende Meteorite, Murchison Meteorite, Stony-Iron Meteorite
8 Feb 2017
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Document Summary
Meteroids, meteors and meteorites: meteroids - these are any object in space with an orbit that does cross earth"s orbit and could potentially collide with earth, meteors these are objects that actually enter earth"s atmosphere. Only usually a portion survives to reach the surface unless the object is very large. Only small pieces actually hit the ground. Meteor showers: meteor showers occur when earth passes through the debris left behind from a comet crossing. Earth orbit: these very small particles seem to originate from a particular location in the sky. This gives them their name: for most showers we have identified the related comet. Not hot when they hit the ground. Can also hit people and things (there are reported cases of this: finds - these are meteorites that have fallen to earth and are later discovered. They can have been in earth"s atmosphere on the ground for very long periods of time.
