Tuesday 9 March 2021

Sunspots from Somerset with a Cooke

 Sunspots from Somerset with a Cooke

Mr R. L. Robinson, Minehead, Somerset using a Thomas Cooke and Sons 6 inch telescope made a series of drawings of sunspots large and small in October, November and December 1929. These spots were of considerable interest because they rapidly changed in appearance on a daily scale.

In many cases details of structure were obtained using a Dawes eyepiece, by which a great deal of the surrounding photosphere can be shut off or even a large part of a spot can be isolated. This is often a great advantage, especially in observing the changes of detail in a bridge or projection.

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