How do you identify meteorites?

  • Thread starter TFM
  • Start date
In summary, it can be difficult to tell the difference between ordinary stones/rocks and meteors, but there are a few ways to distinguish them. One way is to look for burned or melted marks on the surface, as meteors experience extreme heat when entering the Earth's atmosphere. Another way is to use a metal detector, as many meteorites have a high iron content and can be detected this way. Additionally, the chemical content of meteorites differs from normal Earth rocks. Most identified meteorites come from Antarctica because it is easier to spot them there on top of the ice. However, using a metal detector can also be helpful in other regions.
  • #1
TFM
1,026
0
Following on from a couple of recent topics on meteors and fireballs got me thinking. how do you tell the difference between ordinary stones/rocks and meteors?

TFM

(Sorry if this is the wrong area to post)
 
Astronomy news on Phys.org
  • #2
meteor in the sky, meteorite on the ground

burned melted or hi iron content [ lots are found with metal detectors]
chemical content of meteorites differs from normal Earth rocks
 
  • #3
TFM, many (I believe most, in fact) identified meteorites come from Antarctica. It's not because meteorites have a preference for landing there, it's because if you find a rock on top of two miles of ice, you're pretty sure it came from the sky. That's not so obvious if it lands in a more temperate region among terrestrial rocks, where it takes an expert to tell - particularly if nobody saw it fall.
 
  • #4
Thanks everyone. now you mention it, I do think I recall somewhere about meteorites being mainly found in Antartica. So the 'best' hope (other then a trip to Antartica) is to use a metal detector, and looks like it has been burned/scorched marks.

Thanks again,

TFM
 

1. How do you determine if a rock is a meteorite?

To identify a meteorite, scientists look for certain characteristics such as a dark, fusion crust on the surface, a high density, and the presence of metal minerals like iron and nickel. They also use a magnet to see if the rock is attracted to it, as meteorites contain a high amount of metal.

2. What is the difference between a meteorite and a regular rock?

Meteorites are rocks that have fallen to Earth from outer space, while regular rocks are formations found on Earth's surface. Meteorites also have unique characteristics such as a fusion crust and a high metal content, which distinguish them from regular rocks.

3. How can you tell the age of a meteorite?

Scientists use a method called radiometric dating to determine the age of a meteorite. This involves measuring the amount of radioactive isotopes in the rock, which decay at a constant rate. By comparing the amount of these isotopes to the amount of their decay products, scientists can estimate the age of the meteorite.

4. What are some tools used to identify meteorites?

Scientists use a variety of tools to identify meteorites, including a microscope to examine the rock's structure, a magnet to test for magnetic properties, and a spectrometer to analyze the chemical composition. They may also use X-ray diffraction and other techniques to study the mineralogy of the meteorite.

5. Are all meteorites from outer space?

Yes, all meteorites are rocks that originated from outer space. They can come from asteroids, comets, and other celestial bodies. Some meteorites are also pieces of the Moon or Mars that were blasted into space by impacts and eventually landed on Earth.

Similar threads

  • Astronomy and Astrophysics
Replies
3
Views
2K
  • Astronomy and Astrophysics
Replies
1
Views
3K
Replies
2
Views
2K
Replies
25
Views
3K
  • Astronomy and Astrophysics
Replies
6
Views
3K
Replies
22
Views
2K
  • Astronomy and Astrophysics
Replies
1
Views
1K
Replies
6
Views
769
Replies
7
Views
1K
Back
Top