posted on Jan, 22 2010 @ 10:22 AM
Is it just me or is this becomming more and more frequent?
Someone asks this question every time there is a big fireball/meteor. Go figure...
It's not just you - alot of other people who are generally ignorant of how often rocks hit Earth also jump to conclusions about the actual frequency.
Here is an explanation.
Of course it could just be an illusion from a distorted perspective.
Very close!
Perspective and
illusion are the key words here...
Most people forget we are living on a curved surface, and that up/down is relative.
For example, an observer in one location might see a meteor apparently moving downwards towards the horizon, whilst another observer in a
different
location might see the same meteor appear to travel upwards and away from the horizon.
My little diagram illustrates what is happening:
[atsimg]http://files.abovetopsecret.com/images/member/1d81f35c53d4.jpg[/atsimg]
Observer A sees the meteor apparently heading upwards and away from the horizon, while observer B sees the meteor apparently falling towards the
horizon.
Of course, all angles in between are also valid.
Actual direction is very hard to determine in the case of meteors, since there are few visual cues in the sky. The only way is if you compare
observations from observers separated by 10's or even hundreds of miles. The illusion comes in since the direction it appears to be traveling in
could be completely different to the actual direction.
[edit on 22-1-2010 by C.H.U.D.]