[meteorite-list] Geophysics, meteorites, and Electron microscopy

[Barb and Jake Baker]

Could someone tell me, in Microscopy 101 language:  How is an electron 
microscope used in the study of meteorites?  Using electron microscopy - 
what differences are apparent between meteorites and terrestrial rocks? For 
instance what are the microscopy differences between lunar basalt and 
terrestrial basalt?

Thanks