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5 Amazing Astronomical Things about Choosing a New Jesuit General! — 1 Comment

  1. As a Civil Engineer, I had no idea that the commonly used Secchi disk was created by Angelo Secchi SJ in 1865. The Secchi disk is a plain white, circular disk 30 cm (12 in) in diameter used to measure water transparency in bodies of water. The disc is mounted on a pole or line, and lowered slowly down in the water. The depth at which the disk is no longer visible is taken as a measure of the transparency of the water. This measure is known as the Secchi depth and is related to water turbidity. Don’t tell me that engineering and astronomy are not linked.

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