Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/5/84; site uwmacc.UUCP Path: utzoo!linus!philabs!cmcl2!seismo!uwvax!uwmacc!demillo From: demillo@uwmacc.UUCP (Rob DeMillo) Newsgroups: net.sf-lovers Subject: Re: visible civilization Message-ID: <1376@uwmacc.UUCP> Date: Wed, 7-Aug-85 18:46:12 EDT Article-I.D.: uwmacc.1376 Posted: Wed Aug 7 18:46:12 1985 Date-Received: Sun, 11-Aug-85 00:08:12 EDT References: <3072@topaz.ARPA> <1355@uwmacc.UUCP> <634@gitpyr.UUCP> Organization: UWisconsin-Madison Academic Comp Center Lines: 47 > > I believe it was Carl Sagan that wrote once (during the Viking Mars mission) > that from orbit Earth looks uninhabited, too...I suppose he meant to the > naked eye, and on the daylight side... > > -- > The above opinions aren't necessarily those of etc, etc...but they > should be!! > > Roy Turner There seems to be some confusion here as to what we were all originally talking about. Charlie Wingate brought up the point that the earth was quite bright in the radio region. I said "no it ain't" and talked about earth being cold, and a poor radio transmitter compared to the sun, and I threw in a little quip about stuff that we humans generate will be disrupted by the earth's atmosphere, the suns atmosphere, attenuation, etc... Then suddenly people started talking about Carl Sagan...! What I was refering to was radio noise that we humans make with our TV transmissions, shortwave transmissions, etc.... Of course, a radio transmission deliberately beamed into space is going to go somewhere! But that is line of sight transmission, and not what we were originally discussing anyway. (The original discussion was about whether or not the earth is visible in the radio region...we aren't.) ...end of transmission... -- --- Rob DeMillo Madison Academic Computer Center ...seismo!uwvax!uwmacc!demillo "...That's enough, that's enough! Television's takin' its toll. Turn it off, turn it off! Give me the remote control! I've been nice! I've been good! Please don't do this to me! I've been nice, turn it off, I don't wanna hav'ta see... ...'The Brady Bunch!'"