spectroscope

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spectroscope

instrument

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comparison to spectrograph

In telescope: Spectrographs
…technically referred to as a spectroscope.
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definition

In spectrum
…of spectra is called a spectroscope, and an instrument that photographs or maps spectra is a spectrograph. Spectra may be classified according to the nature of their origin—i.e., emission or absorption. An emission spectrum consists of all the radiations emitted by atoms or molecules, whereas in an absorption spectrum portions…
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study of comets

In comet: Ancient Greece to the 19th century
…at a comet through a spectroscope, and he discovered three broad emission bands that are now known to be caused by long-chain carbon molecules in the coma. The first spectrogram (a spectrum recorded on film) was of Comet Tebbutt (C/1881 K1), taken by English astronomer William Huggins on June 24,…
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