Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!mips!ptimtc!nntp-server.caltech.edu!palmer From: palmer@nntp-server.caltech.edu (David Palmer) Newsgroups: sci.space Subject: Re: == No Subject == Message-ID: <1991Jun16.174416.8154@nntp-server.caltech.edu> Date: 16 Jun 91 17:44:16 GMT References: <1991Jun16.125922.7401@demon.co.uk> Organization: California Institute of Technology, Pasadena Lines: 20 shafer@skipper.dfrf.nasa.gov (Mary Shafer) writes: >You're quite incorrect. I asked Gordon Fullerton (you know, STS-2, etc) >about this and he said that the Great Wall isn't even visible in LEO. >However, quite a few man-made structures are visible from LEO, including >dams, airports, freeways in the deserts, and cities. >Dave Scott (Apollo 15) once told me that the only man-made thing he >could see from the moon was city lights at night and even those were >pretty dim. Probably the easiest manmade thing to see from space is the Sahara Desert. (This desert is the result of domestic animals under human control, e.g. goats, eating away the vegetation at the periphery, allowing the desert to spread.) -- David Palmer palmer@gap.cco.caltech.edu ...rutgers!cit-vax!gap.cco.caltech.edu!palmer "Operator, get me the number for 911" --Homer Simpson