What does Phil Plait (the famous Bad Astronomer) and Eise Eisinga (a wool carder from Franeker, Netherlands, who lived 1744 - 1828) have in common?
Jacco
Gosh, I almost forgot that I ever wrote this. Well, 14 months later it looks like I have to answer my own question. So, just in case some internet archeologist

stumbles upon this thread in the far future:
A conjunction of planets occurred on 8 May 1774. Some Dutch Reverend predicted that the planets and the moon would collide, with the result that the earth would be pushed out of its orbit and burned by the sun. Eise Eisinga, a Dutch (or actually a Frisian) woolcarder and amateur astronomer wanted to show that there was no reason for panic. He decided to build an orrery, a type of planetarium, in the ceiling of his living room. He invited people from his village to come to his house, and learn that they had nothing to fear from the conjunction.
More than 200 years later, another conjunction of planets occured in May of 2000. Doomsayers predicted earthquakes, floods, or just The End Of Our World in general. Astronomer Phil Plait took it as his duty to debunk these predictions on his Bad Astronomy website (badastronomy.com) very extensively.
So Eise Eisinga ( www(dot)planetarium-friesland(dot)nl/engels.html ) and Phil Plait are both debunkers of doomsday predictions in connection with planetary conjunctions.
OK, I may look silly

by going through this trouble of replying to my own post in a thread that died out a long time ago. But having visited Eisinga's planetarium and being a frequent reader of the BA blog, I just think this is a very, very cool fact...
Thanks for reading.
Jacco