Sunday 20 June 2021

A large Cooke looks at Mars


Mars -

Mr V. Cerulli reports his observations made at Teramo, in the Bulletin of the Belgian Astronomical Society, and accompanies his account with a chart and 11 drawings made between December 1896 and January 7, 1897, with a 15½-in. Cooke refractor. 

He remarks that the canals appeared hardly thinner on a disk of 7 " (July 1896), than they were on the disk of 17" (December) and, therefore, supposes that the lines become thicker as Mars travels away. He also found that lines that appeared dark and distinct when near the limb became fainter and narrower when on the meridian.

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