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- Oct 29, 2019
- 3 min
Transit of Mercury on November 11
On Monday, November 11, 2019, the planet Mercury does a marathon dash across the face of the sun. It takes awhile --about five and a...
- Oct 29, 2019
- 2 min
Black Drop Effect Coffee
With the Transit of Mercury approaching, it's time to revisit the black drop effect. The following is adapted from 2012 article at...