On This Day In Chemistry

July 8th

Astrophysicist Jason Cardelli announced that he had detected thallium (Tl) and lead (Pb) in interstellar gas on this day in 1994

Interstellar space refers to the areas between star systems within a galaxy. It varies hugely in composition, and contains atomic, molecular and ionic particles as well as cosmic radiation. Cardelli used spectroscopy and the scattered-light characteristics to identify the elements within.

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