150 years ago, first observation of the spectrum of a planetary nebula, apricot

150 years ago, first observation of the spectrum of a planetary nebula

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Description

150 years ago, on August 29, 1864, Williams Huggings observed for the first time the spectrum of a planetary nebula .

“On August 29, 1864, I directed the telescope armed with the spectrum apparatus to this nebula. At first I suspected some derangement of the instrument had taken place ...”

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  • 150 years ago, first observation of the spectrum of a planetary nebula, apricot
    Original
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    150 years ago, first observation of the spectrum of a planetary nebula, apricot
    B

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150 years ago, first observation of the spectrum of a planetary nebula, apricot