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On Sat, 4 Aug 2018 21:37:11 -0700 (PDT), RichA
wrote: On Friday, 3 August 2018 02:57:23 UTC-4, Chris L Peterson wrote: On Thu, 2 Aug 2018 21:06:17 -0700 (PDT), RichA wrote: On Wednesday, 1 August 2018 19:59:37 UTC-4, Quadibloc wrote: On Wednesday, August 1, 2018 at 5:19:31 PM UTC-6, RichA wrote: Really, Venus may be 800 degrees on the surface, but Mars is just as dead. If there's liquid water underground on Mars, we can't quite completely rule out life on Mars any more. Of course, Mars has always been considered as a possible home of life due to its superficial similarity to Earth - the gas giants, or some of their satellites, _may_ be much better bets. Venus is rather more certainly dead, thanks to being 800 degrees hot - and not only is it less likely to already have life, it's also less useful to Earthly life, specifically human beings. It might be possible to use Mars as a place to live. But is it possible Venus at some point was more hospitable to life than Mars ever was? It is certainly possible. But that's not something we're likely to determine from a surface probe. I just want better pictures. Mars has been imaged to death. And yet, new images continue to produce new discoveries. Not to mention all the other instrumentation that doesn't get reported on so much in the popular press, but which produce a steady stream of papers. |
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On Saturday, August 4, 2018 at 10:37:13 PM UTC-6, RichA wrote:
I just want better pictures. Mars has been imaged to death. Venus' atmosphere is so dense, it interferes with taking good pictures there, so it will hardly help. John Savard |
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On Sunday, 5 August 2018 10:37:02 UTC-4, Quadibloc wrote:
On Saturday, August 4, 2018 at 10:37:13 PM UTC-6, RichA wrote: I just want better pictures. Mars has been imaged to death. Venus' atmosphere is so dense, it interferes with taking good pictures there, so it will hardly help. John Savard I thought the Russian images from 1975(?) were pretty good, given the technology then. I don't know what the atmospheric extinction is, but they can still image their immediate surroundings. |
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RichA wrote:
On Sunday, 5 August 2018 10:37:02 UTC-4, Quadibloc wrote: On Saturday, August 4, 2018 at 10:37:13 PM UTC-6, RichA wrote: I just want better pictures. Mars has been imaged to death. Venus' atmosphere is so dense, it interferes with taking good pictures there, so it will hardly help. John Savard I thought the Russian images from 1975(?) were pretty good, given the technology then. I don't know what the atmospheric extinction is, but they can still image their immediate The Venera 13 colour images show a horizon although there is some doubt whether it is 100 metres away or a mirage. |
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On Tuesday, 7 August 2018 09:59:04 UTC+2, Mike Collins wrote:
I thought the Russian images from 1975(?) were pretty good, given the technology then. I don't know what the atmospheric extinction is, but they can still image their immediate The Venera 13 colour images show a horizon although there is some doubt whether it is 100 metres away or a mirage. Is the density and chemical makeup of Venus' atmosphere sufficient to cause noticeable refraction? I suppose if the visual sensor is totally immersed then it hardly matters. Only if they are looking in, or out of the toxic goldfish bowl would one enjoy the "stick in water" effect. |
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Thread | Thread Starter | Forum | Replies | Last Post |
Mars: As dead as Venus ever was? | Rich[_1_] | Amateur Astronomy | 0 | February 16th 08 02:01 AM |
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