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#11
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Mars exploration
On Tue, 15 Jul 2003 18:07:30 GMT, "Bob Doyle"
wrote: It's a long, long way to Mars, and transversing that void is going to require some leadership, imagination, and funding. None of those seems likely from my government, how about yours? We are far too busy wasting money on other important issues. Andrew Do you need a handyman service? Check out our web site at http://www.handymac.co.uk |
#12
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Mars exploration
Bert blurted out:
Two Of Nasa's explorations of Mars in 1999,and one in 1997 all ended up as failures. Bert, when will you get a decent calendar?? In 1997, only one NASA mission was intended for Mars, and it (Mars Pathfinder) was ENTIRELY SUCCESSFUL!! The two failures (Mars Climate Explorer and Mars Polar lander) were in 1999. You have little credibilty here Bert! -- David W. Knisely Prairie Astronomy Club: http://www.prairieastronomyclub.org Hyde Memorial Observatory: http://www.hydeobservatory.info/ ********************************************** * Attend the 10th Annual NEBRASKA STAR PARTY * * July 27-Aug. 1st, 2003, Merritt Reservoir * * http://www.NebraskaStarParty.org * ********************************************** |
#13
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Mars exploration
David you are right I was going to post the two 1999 failures,and one
shortly before that time. I took a calculated guess when I said 1997. Still NASA had three failures in a very short time. That was the main point of my post. Bert David why did you use a bad term like "blurted out" |
#14
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Mars exploration
Bert posted:
David you are right I was going to post the two 1999 failures,and one shortly before that time. I took a calculated guess when I said 1997. Still NASA had three failures in a very short time. That was the main point of my post. Bert David why did you use a bad term like "blurted out" Because you are still grossly wrong Bert! There were not *three failures* when it comes to the Mars probes. There were only two. You can't stretch the timeframe from 1999 to 2003 and call it "a very short time". -- David W. Knisely Prairie Astronomy Club: http://www.prairieastronomyclub.org Hyde Memorial Observatory: http://www.hydeobservatory.info/ ********************************************** * Attend the 10th Annual NEBRASKA STAR PARTY * * July 27-Aug. 1st, 2003, Merritt Reservoir * * http://www.NebraskaStarParty.org * ********************************************** |
#15
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Mars exploration
David I was not grossly wrong. You are grossly wrong in saying I'm
grossly wrong. NASA had a Mars failure before their two Mars failures in 1999,and that is a recorded "FACT" Bert |
#16
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Mars exploration
Bert posted:
David I was not grossly wrong. You are grossly wrong in saying I'm grossly wrong. NASA had a Mars failure before their two Mars failures in 1999,and that is a recorded "FACT" Its a recorded FACT that there were a *lot* of failures in various probes to Mars before 1999. You are being almost completely unspecific. What you stated "Still NASA had three failures in a very short time", was wrong even after I pointed your earlier error out (and thus you are grossly wrong this time Bert). There were only *two* failures in 1999, not three, and *none* in 1997. Before that, you have to go all the way back to *1993* to find a Mars probe failure, and before that, you have to go back to 1971. The 1999 failures were in a relatively short time (less than a year), but you have to go back 6 times as long to find another one. Since you seem unable to dig up the correct information despite your presumed access to the Internet, I will supply the real facts this time. In the 1960's, the first attempts at reaching the moon and planets had frequent failures. For example, Rangers 1 through 6 all failed, with 7, 8, and 9 finally succeeding (only a 33% success rate). As far as planetary probes are concerned, Mariner's 1 (Venus), 3 (Mars), and 8 (Mars) all failed. Then, there were the nice successes with Mariner 4, 6, 7, and 9 all reaching Mars. Vikings 1 and 2 were complete successes, but the Mars Observer failed just before it reached Mars in August of 1993. Its loss was effectively "replaced" with the successful Mars Global Surveyor in 1997 and Mars Odyssey in 2001, along with the successful Mars Pathfinder lander and rover. There were two failures in between as previously mentioned. So, NASA has had 5 failures and 9 successes out of a total of 14 attempts (a 64% success rate). The Russians didn't have much better luck (in fact, it was worse), and the Japanese have had problems also. What all this means is that sending probes to Mars and getting them to operate properly in the hazardous environment of deep space for a long period of time to yield a successful mission is a difficult task no matter who is doing it. -- David W. Knisely Prairie Astronomy Club: http://www.prairieastronomyclub.org Hyde Memorial Observatory: http://www.hydeobservatory.info/ ********************************************** * Attend the 10th Annual NEBRASKA STAR PARTY * * July 27-Aug. 1st, 2003, Merritt Reservoir * * http://www.NebraskaStarParty.org * ********************************************** |
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