Both the Mayans and the Aztecs developed advanced calendars and had an understanding of astronomy.
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Answer:
Showing that the spectra of stars depended on the ___temperature_____ and the ____degree of ionization of elements _______ in their atmospheres.
She showed that stars were mainly ______ hydrogen________ with the next most abundant element being ______ helium ________.
Explanation:
Cecilia Payne worked at the Harvard College Observatory (HCO) where she analyzed for months the spectra of hundreds of stars; she aimed to calculate the elements present in them; and from her observations and studies over the years she discovered the information quoted above.
<span>Research indicates that minorities are most influential when they</span>