What is a comet's chemical composition?
Not much different. Stony metorites contain the same minerals as continental crust.
Iron-nickel meteorites, such as the one that created Meteor Crater, near Flagstaff, Arizona, more closely resemble the composition of the Earth's solid core.
- determination of the chemical composition o f our planetary system (Sun planets) - determination of the composition of stars - determination of the composition of comets and meteorites - identification of chemical compounds in the universe Some branches of chemistry are involved: cosmochemistry, spectrometry, chemical analysis.