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Venus Express press conference November 28th, Venus: a more Earth-like planetary neighbour
belleraphon1
post Nov 20 2007, 12:27 PM
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Venus Express press conference set for November 28th.

http://www.esa.int/esaCP/SEMX1C63R8F_index_0.html

‘Venus: a more Earth-like planetary neighbour’
Latest results from Venus Express
28 November 2007, 15:00, room 137
ESA Headquarters, 8-10 rue Mario-Nikis, Paris

15:00 Introduction, by Håkan Svedhem, ESA Venus Express Project Scientist
15:07 Venus: What we knew before, by Fred Taylor, Venus Express Interdisciplinary Scientist

15:15 Temperatures in the atmosphere of Venus, by Jean-Loup Bertaux, SPICAV Principal Investigator

15:25 The dynamic atmosphere of Venus, by Giuseppe Piccioni, VIRTIS Principal Investigator

15:40 Venus’s atmosphere and the solar wind, by Stas Barabash, ASPERA Principal Investigator

15:50 Climate and evolution, by David Grinspoon, Venus Express Interdisciplinary Scientist

16:00 Conclusion, by Dmitri Titov, Venus Express Science Coordinator and VMC scientist

16:05 Questions and Answers

16:25 Individual interviews

17:30 End of event

Craig
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Guest_Zvezdichko_*
post Nov 29 2007, 02:45 PM
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Venus Express is not the first spacecraft to detect lightning. The first probes to detect lightning and thunderstorms are Venera landers.
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tedstryk
post Nov 29 2007, 03:08 PM
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There was always controversy surrounding that. None of the orbiters/flyby spacecraft had found anything definitive, the short lifespans of the landers, and the extreme conditions they were under, there was some uncertainty as to whether some of the charges might be related to the spacecrafts themselves.


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JRehling
post Nov 29 2007, 07:30 PM
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QUOTE (tedstryk @ Nov 29 2007, 07:08 AM) *
There was always controversy surrounding that. None of the orbiters/flyby spacecraft had found anything definitive, the short lifespans of the landers, and the extreme conditions they were under, there was some uncertainty as to whether some of the charges might be related to the spacecrafts themselves.


Yes, if you just follow the headlines without reading between the lines, the story on venusian lightning reads: Yes there is; No there isn't; Yes there is; No there isn't; Yes there is. Cassini's team said that either Venus has no lightning, or if it does, it's really rare or really different than Earth's. Those hedges are possibly the key: Cassini's radio and plasma wave instrument said no. VEx's magnetometer says yes. These could be reconciled if there's lightning on Venus, but something totally blocks the radio/plasma signals (or there never are any), but the magnetic field comes through. My conclusion is that that is almost certainly the case. The only alternative would be that Venus sometimes has lots of lightning, but sometimes no lightning anywhere on the planet. That's hard to believe, verging on impossible to believe. Perhaps if volcanic ash clouds are the source of all lightning, that would be possible, with lightning depending upon eruptions. For now, that explanation doesn't stand up very well to Occam's Razor.

Venus has some pretty different atmospheric conditions from the "other" lightning planets (Earth, Jupiter, Saturn -- an unlikely trio), especially in that lacking a magnetic field, the thick atmosphere gets pounded by solar wind. Maybe that is the key distinction in the lack of radio/plasma detection.

I'm not sure if lightning on Venus has any ramifications other than
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JRehling
post Nov 30 2007, 05:43 PM
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QUOTE (JRehling @ Nov 29 2007, 11:30 AM) *
I'm not sure if lightning on Venus has any ramifications other than


Oops. Cut myself off there. I meant to say, ... other than its own existence/nonexistence. Ie, I don't know if any putative lightning would actually do anything besides crackle and flash. On Earth, it creates ozone. Maybe lightning does/would leave some chemical footprints in the venusian clouds?
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Posts in this topic
- belleraphon1   Venus Express press conference November 28th   Nov 20 2007, 12:27 PM
- - belleraphon1   Also... The results will appear in a special sec...   Nov 20 2007, 12:29 PM
- - cndwrld   Press Conference Results The press conference res...   Nov 28 2007, 08:07 PM
- - nprev   To say nothing of Venus' past. It looks as if ...   Nov 29 2007, 12:59 AM
- - Zvezdichko   Venus Express is not the first spacecraft to detec...   Nov 29 2007, 02:45 PM
|- - tedstryk   There was always controversy surrounding that. No...   Nov 29 2007, 03:08 PM
|- - JRehling   QUOTE (tedstryk @ Nov 29 2007, 07:08 AM) ...   Nov 29 2007, 07:30 PM
|- - JRehling   QUOTE (JRehling @ Nov 29 2007, 11:30 AM) ...   Nov 30 2007, 05:43 PM
- - edstrick   CT Russell is one of the partisan participants in ...   Nov 30 2007, 11:38 AM
- - Julius   I am no planetary sceintist but just a humble enth...   Nov 30 2007, 11:57 AM
|- - JRehling   QUOTE (Julius @ Nov 30 2007, 03:57 AM) I ...   Nov 30 2007, 05:20 PM
||- - Juramike   QUOTE (JRehling @ Nov 30 2007, 12:20 PM) ...   Nov 30 2007, 06:15 PM
|- - hendric   QUOTE (Julius @ Nov 30 2007, 05:57 AM) I ...   Nov 30 2007, 05:37 PM
|- - elakdawalla   QUOTE (hendric @ Nov 30 2007, 09:37 AM) I...   Nov 30 2007, 06:31 PM
- - nprev   Let's not forget that there's a poorly und...   Nov 30 2007, 06:28 PM
- - hendric   QUOTE (Juramike @ Nov 30 2007, 12:15 PM) ...   Nov 30 2007, 07:44 PM
|- - Juramike   QUOTE (hendric @ Nov 30 2007, 02:44 PM) H...   Nov 30 2007, 08:03 PM
||- - Julius   QUOTE (Juramike @ Nov 30 2007, 09:03 PM) ...   Nov 30 2007, 09:26 PM
||- - vjkane   As I remember, one of the puzzles of planetary sci...   Dec 1 2007, 12:30 AM
||- - JRehling   QUOTE (vjkane @ Nov 30 2007, 04:30 PM) As...   Dec 1 2007, 01:00 AM
||- - mcaplinger   QUOTE (JRehling @ Nov 30 2007, 05:00 PM) ...   Dec 1 2007, 02:33 AM
||- - Tom Tamlyn   So also is the existence of a large moon (product ...   Dec 1 2007, 02:38 AM
||- - brellis   The other day, I found a copy of David Grinspoon...   Dec 1 2007, 06:11 AM
||- - JRehling   QUOTE (brellis @ Nov 30 2007, 10:11 PM) T...   Dec 1 2007, 08:08 AM
|- - AndyG   QUOTE (hendric @ Nov 30 2007, 07:44 PM) ....   Dec 1 2007, 02:00 PM
|- - JRehling   QUOTE (AndyG @ Dec 1 2007, 06:00 AM) Woul...   Dec 1 2007, 04:30 PM
- - edstrick   Regarding the lack of magnetic field... 1) Venus ...   Dec 1 2007, 10:26 AM


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