PDA

View Full Version : O/T more "Mars" rocks



radkins
01-17-2012, 03:50 PM
I see where scientists have found more rocks that are purported to be from Mars, this time in Africa. Are they really from Mars? I would assume that most likely they are but when reading these stories about Martian meteorites they are discussed as if they are in fact from Mars and the researchers do not even seem consider they may not be. The theory that Mars was once impacted by a large object that ejected material out into space and this material is what they are finding seems to be presented as indisputable fact instead of theory but could it be that maybe they are assuming too much? I can see how they can be 100% certain that rocks found in the antarctic ice is from space but how can they be so sure of exactly where it originated? Like I said they probably are right it's just that I think it's a bit much to present it as if it's a 100% certainty.

Thoughts?

garyphansen
01-17-2012, 04:09 PM
I agree with you. Far too often they present theories as fact. Some, may be, but others are not. Gary P. Hansen

sasquatch
01-17-2012, 04:41 PM
Probably plain old therory again.

Remember ALL the therories over the years?

lazlo
01-17-2012, 05:11 PM
The meteorites are run through a mass spectrometer. Each planet (or satellite) has a unique chemical signature.

http://www.ajc.com/news/nation-world/scientists-confirm-rocks-fell-1305596.html

Fasttrack
01-17-2012, 08:10 PM
If it makes you feel any better, at least one meteorite found in Africa turned out to be nearly identical in composition and structure to the samples returned by Apollo 16.

Apart from the chemical composition, meteorites are identified by physical characteristics, too. Here is some basic reading written by Dr. Korotev on how Lunar samples are identified:

http://meteorites.wustl.edu/lunar/howdoweknow.htm

Similar arguments can be made for martian rocks.