Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10 5/3/83; site flairvax.UUCP Path: utzoo!watmath!clyde!floyd!harpo!decvax!decwrl!flairvax!kissell From: kissell@flairvax.UUCP (Kevin D. Kissell) Newsgroups: net.followup Subject: Re: An oldie revisited Message-ID: <333@flairvax.UUCP> Date: Fri, 17-Feb-84 15:13:08 EST Article-I.D.: flairvax.333 Posted: Fri Feb 17 15:13:08 1984 Date-Received: Sat, 18-Feb-84 04:21:52 EST Organization: Fairchild AI Lab, Palo Alto, CA Lines: 15 (Sigh) When the moon is on the horizon, its image passes through more of the atmosphere than when it is overhead. This *can* affect the size (and shape) of the image slightly. The usual effect (or so an astronomer once told me) is that the image of the moon is *smaller* on the horizon than overhead. Next time you want to try an experiment, instead of looking at the moon on the horizon and "imagining what it would look like overhead", take photographs with a fixed focal-length lens of the moon both on the horizon and overhead, preferrably on the same night. Then measure the resulting images. Kevin D. Kissell uucp: {ihnp4 decvax}!decwrl!\ >flairvax!kissell {ucbvax sdcrdcf}!hplabs!/