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The New Star.—Astronomers have been surprised by the fact, which was first announced by Dr, Hartwig on the 29th of August, that a star of about the eighth magnitude had suddenly appeared in the middle of the great nebula of Andromeda. This nebula, the most conspicuous of all the phenomena of the kind, has long been regarded as a stellar nebula, since Mr, Huggins showed that its spectrum possessed the characteristics of stellar spectra, but it has never been resolved. The appearance of the new star within it, if it belong to it, which is not yet ascertained, may mark some important movement going on within it. The star was seen, within a few days of