Abstract
VARIABILITY OF THE ANDROMEDA NEBULA.—The January number of the Monthly Notices of the Royal Astronomical Society contains a note by Mr. Isaac Roberts, entitled “Photographic Evidence of Variability in the Nucleus of the Great Nebula in Andromeda.” Between 1885 and 1890 a dozen photographs of this object were taken on several plates; and especially on three negatives taken with exposures of 5, 15, and 60 minutes in December 1890, the nucleus of the nebula has a decidedly stellar appearance. Other plates, exposed for both short and long intervals of time, show no trace of a stellar nucleus. It may therefore reasonably be inferred that the nucleus of the nebula is variable.
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Our Astronomical Column. Nature 43, 379 (1891). https://doi.org/10.1038/043379a0
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DOI: https://doi.org/10.1038/043379a0