You see, Christopher Wren, the famous architect, built the observatory in the astronomer's home. Wren, while a fabulous architect (the room is quite lovely, actually), wasn't so smart when it came to astronomy. The room was surrounded by windows, which faced every concievable direction .... except for directly North and South. As a result, the frequently-ill Flamsteed was forced to take his telescope up to the roof to make his observations properly. He also made some of his observations from his vegetable garden. And you thought your job sucked.
Anyway, Flamsteed's home is now a museum, and right next to it is one that shows the development of time-keeping, particularly in relation to naval history. Imaginably, once you're out of sight of land, it's difficult to know what time it is. The museum chronicles the development of a reliable (and portable) clock, which is actually pretty interesting. It also tells you some of the more .... eccentric ideas they had for letting sailors know what time it was. For example, someone had the brilliant idea of having the guys at various ports-of-call fire off a rocket every day at exactly noon, so that the ships out at see would see it and know that it was noon. This didn't work, because, well, if you were out at sea, you probably wouldn't see the damn rocket, and also because the rockets of the time were unreliable and wouldn't fly very high.
These museums are definitely worth seeing, but it is rather difficult to drag your butt up there to see them (they're both at the top of a very large hill, which actually makes for pretty views).
Flamsteed's house was built in this particular location because it stands on (or if you believe the sign, really, really next to) the prime meridian, which the zero point of longitude. For those of you who confuse longitude and latitude like I do, longitude is the one that measures east to west. Also, that is the millienium clock ticking away directly beneath the prime meridian display.
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