Tag Archives: extraterrestrials

Reticulum – the net

November 6, 2016

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The stars in the constellation Reticulum represent the tiny network of lines in a certain type of telescope eyepiece. They are engineered into a lens element and are akin to the cross-hairs in a rifle scope. In this case they are not only used for aiming, but also for measuring angular separations, and in modern […]

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