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Updated: May 24, 2025
Dr. Elkin, of Yale college, co-operated throughout, and the heliometers of Dresden, Göttingen, Bamberg, and Leipzig, shared in the work, while Dr. Auwers of Berlin was Sir David Gill's personal coadjutor at the Cape.
See's calculations showed it to possess one-fifth the mass of its primary, or rather more than half that of our sun. Yet it gives barely 1/20000th of the sun's light, so that it is still nearer to total obscurity than the dusky satellite of Sirius. The period of forty years assigned to the system by Auwers in 1862 appears to be singularly exact.
Auwers deduced from the German heliometric measures the unsatisfactorily small value of 92,000,000 miles. The transit of 1882 had not, then, brought about the desired unanimity. The state and progress of knowledge on this important topic were summed up by Faye and Harkness in 1881. Each has its special difficulties and sources of error; each has counter-balancing advantages.
What made the matter all the more certain was that there was a change in the direction of the object which corresponded very closely to the motion as it had been predicted by Auwers. The latter published a revision of his work, based on the new observations. A year later, the parties that had been observing the transit of Venus returned home.
As coöperation among the parties from different countries would be generally helpful, I accepted an invitation to attend a meeting of the German commission, to be held at Hanover in August, 1873. Hansen was president of the commission, while Auwers was its executive officer.
But none can be pleasanter than the Germans, when you once make their acquaintance; and we shall always remember with pleasure the winter we passed in Berlin. To-day, Auwers stands at the head of German astronomy. In him is seen the highest type of the scientific investigator of our time, one perhaps better developed in Germany than in any other country.
Auwers of Berlin completed in 1866 a splendid piece of work, for which he received in 1888 the Gold Medal of the Royal Astronomical Society.
I mention the matter because taking back a ticket is said to be quite unusual on a German railway. At Berlin, the leading astronomers then, as now, were Förster, director of the observatory, and Auwers, permanent secretary of the Academy of Sciences. I was especially interested in the latter, as we had started in life nearly at the same time, and had done much work on similar lines.
On the 21st of May, 1860, M. Auwers perceived at Königsberg a seventh magnitude star shining close to the centre of a nebula in Scorpio, numbered 80 in Messier's Catalogue. Three days earlier it certainly was not there, and three weeks later it had vanished. The effect to Mr.
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