1998 Ah, vacations. Most people, when they take vacations, forget about work and responsibilities and simply relax.
Astronomy is everywhere, even on vacation in sunny Florida.
No matter how hard I try to relax and get away from it all, astronomy finds a way to creep in to my life. There are lots of methods, actually. One is that the shadow of the Earth on the Moon is always round, indicating that the Earth must be a ball. Another is that a ship sailing away will appear to slip below the horizon, because it is going around the curvature of the Earth. While true, this one is a little unsatisfying because there are all sorts of weird optical effects as you look through all that air to the horizon.