The iron-sulfur mineral troilite is characteristic of the "iron" type of these objects, whose "stony" type includes carbonaceous chondrites that may contain amino acids.
These objects are classified based on pressure and weathering into the 6-point S and W scales. A current debate is whether the howardite-eucrite-diogenite, or HED, group of these objects can truly be tied to a single basaltic parent body. Unique samples of these objects were thoughtfully frozen after being discovered at Tagish Lake. A 1996 paper by Shu, Shang, and Lee proposed a theory of these objects which suggests that magneto-centrifugally driven winds made their calcium-aluminum-rich inclusions. Etching with a weak acid exposes bands of kamacite and taenite called Widmanstätten patterns in these objects. The iron-sulfur mineral troilite is characteristic of the "iron" type of these objects, whose "stony" type includes carbonaceous chondrites that may contain amino acids. For 10 points, name these pieces of debris, found on Earth, that originate with objects of extraterrestrial origin.
These objects are classified based on pressure and weathering into the 6-point S and W scales.
meteorites [or meteors; or meteoroids; or chondrites]