Transmission electron microscopy has been used to examine carbon extracted from the Allende meteorite. The structure of the carbon is rather disordered, consisting of curved and faceted graphitic sheets which often enclose voids of the order of 2–10 nm in size. Completely closed fullerene particles are quite commonly observed. This carbon is a strong candidate to be a carrier of planetary gases. Carbon‐coated crystallites, which appear to be iron sulphide, are also found in the carbon.