Giovanni Battista Donati
Giovanni Battista Donati
1826-1873
Italian astronomer who investigated stellar spectra and discovered Donati's comet in 1858. Donati was the first to observe the spectrum of a comet and used stellar spectroscopy to identify the chemical elements that make up the comet's body and tail. Since comets are thought to represent the primordial composition of the solar system, this technique is used today to gain better understanding of how the solar system formed.
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• symb. the chemical element lutetium. , Lu • symb. the chemical element lutetium. • symb. the chemical element strontium. , Sr • symb. the chemical element strontium.
sr • abbr. steradian(s).
sr Maths., symbol for steradian • symb. the chemical element plutonium. , Pu • symb. the chemical element plutonium.
Pʾu (Chin., ‘rough block’). Taoist understanding of the original innocence and simplicity of human nature,… Mg , MG • abbr. ∎ machine gun. ∎ hist. Morris Garages.
mg • symb. the chemical element magnesium. mg • abbr. milligram(s): 100 mg acetaminophen.
mg • symb… Chemical Elements , By the end of the nineteenth century, the elements and matter comprising all things could no long be viewed as immutable. The dramatic rise of scient… • symb. the chemical element neptunium. , Np • symb. the chemical element neptunium.
NP • abbr. notary public.
NP, NP-complete See P=NP question.
np neap (tides)
• Printing new paragraph
• ne…
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Giovanni Battista Donati