RARE BOOK DIVISION / NEW YORK PUBLIC LIBRARY / SCIENCE PHOTO LIBRARY RARE BOOK DIVISION / NEW YORK PUBLIC LIBRARY / SCIENCE PHOTO LIBRARY
Solar prominences. These consist of plasma (ionised gas) at a much cooler temperature than that found in the corona, the Sun's atmosphere. This makes the prominence visible as a darker feature as it erupts from the layer of the Sun known as the photosphere. Solar prominences can be thousands of kilometres in length and last for days or months. These solar prominences were observed on 5 May 1873 at 9:40am. Artwork by French artist and astronomer Etienne Leopold Trouvelot (1827-1895).
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