On the structure of an iron-nickel meteorite

his is a macro photograph of the Muonionalusta meteorite in the ground and etched condition showing the Wedmanstatten structure. The diagonal line in the lower right hand zone of the specimen is a prior-Taenite grain boundary.
Figure 1: This is a macro photograph of the Muonionalusta meteorite in the ground and etched condition showing the Wedmanstatten structure. The diagonal line in the lower right hand zone of the specimen is a prior-Taenite grain boundary.

An earlier version of this article appeard on rexp2research.com.

It is illegal in the United States to own a moon rock. However, this does not prevent one from possessing other interstellar material. Meteorites are a great example of material not from the earth. They have fascinated people for centuries and were once an important source of metal before smelting was available.