Venus Express |
Venus Express |
 Apr 12 2005, 06:56 PM
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 Interplanetary Dumpster Diver  Group: Admin Posts: 4405 Joined: 17-February 04 From: Powell, TN Member No.: 33  |
If all goes well, Venus Express will be a major topic for discussion in this forum a year from now. Does anyone know how good the surface coverage will be from VIRTIS and VMC? My understanding is that VIRTIS will obtain low resolution multispectral maps, and that VMC will, in addition to cloud monitoring, have one channel that can see the surface, but I don't know at what resolution or at what quality. It will be nice to have some non-radar images of Venus' surface besides the Venera snapshots and the shadowy images from Earth and Galileo's NIMS.
Ted -------------------- |
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Nov 7 2005, 03:54 PM
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#2
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Senior Member Group: Members Posts: 1636 Joined: 9-May 05 From: Lima, Peru Member No.: 385 |
Besides, the other intrigating thing is that Venus sluggishly rotates on its axis once every 243 Earth days, while it orbits the Sun every 225 days - its day is longer than its year!
On the other hand, Venus rotates retrograde, or "backwards," spinning in the opposite direction of its orbit around the Sun. From its surface, the Sun would seem to rise in the west and set in the east. The other odd thing is that its Equatorial Inclination to Orbit is 177.3 degrees. By comparison, it is: 7.56 x Earth. That is its north pole is almost pointing to the south pole. These are at least one of the oddies things that I would like to understand: Why does the day is longer than a year? Why the planet rotates on backwards? Rodolfo |
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Nov 7 2005, 04:03 PM
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 Senior Member Group: Members Posts: 2454 Joined: 8-July 05 From: NGC 5907 Member No.: 430 |
QUOTE (RNeuhaus @ Nov 7 2005, 10:54 AM) Besides, the other intrigating thing is that Venus sluggishly rotates on its axis once every 243 Earth days, while it orbits the Sun every 225 days - its day is longer than its year! On the other hand, Venus rotates retrograde, or "backwards," spinning in the opposite direction of its orbit around the Sun. From its surface, the Sun would seem to rise in the west and set in the east. The other odd thing is that its Equatorial Inclination to Orbit is 177.3 degrees. By comparison, it is: 7.56 x Earth. That is its north pole is almost pointing to the south pole. These are at least one of the oddies things that I would like to understand: Why does the day is longer than a year? Why the planet rotates on backwards? Rodolfo  A whomping big celestial impact is my guess. -------------------- "After having some business dealings with men, I am occasionally chagrined,
and feel as if I had done some wrong, and it is hard to forget the ugly circumstance. I see that such intercourse long continued would make one thoroughly prosaic, hard, and coarse. But the longest intercourse with Nature, though in her rudest moods, does not thus harden and make coarse. A hard, sensible man whom we liken to a rock is indeed much harder than a rock. From hard, coarse, insensible men with whom I have no sympathy, I go to commune with the rocks, whose hearts are comparatively soft." - Henry David Thoreau, November 15, 1853 |
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Nov 7 2005, 04:26 PM
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#4
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Senior Member Group: Members Posts: 1636 Joined: 9-May 05 From: Lima, Peru Member No.: 385 |
QUOTE (ljk4-1 @ Nov 7 2005, 11:03 AM) A whomping big celestial impact is my guess. Interesting but...why no a moon. After an impact to Venus and that should have a moon like the Earth's case. I thought that the Venus' slow rotation might be caused by a very heavy atmosphere that circulates the planet in the opposite side to its rotation. Or perhaps that is a normal for physics' law since its neigboor planet Mercury rotates around 58 Earth days and orbits around the Sun 88 Earth days. That is more or less a very long day that approach to a "planet of close one year" for both Mercury (less days) and Venus (more days). Rodolfo |
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tedstryk Venus Express Apr 12 2005, 06:56 PM
BruceMoomaw See my new note on the "Radar on Venus Expres... Apr 20 2005, 10:31 AM
tedstryk Actually, VMC will have some limited capabliity to... Apr 21 2005, 03:16 AM BruceMoomaw You've caught me -- I was completely unaware o... Apr 21 2005, 05:34 AM Mode5 To the powers that be, thank you for creating this... Apr 21 2005, 05:53 AM Gsnorgathon Ted - do you have a link for the ESA mission doc(s... Apr 21 2005, 07:08 AM tedstryk http://megasn.obspm.fr/VEX_MDR51.doc
It is a bit ... Apr 21 2005, 09:17 AM djellison I wonder if the effects of looking thru narrow spe... Apr 21 2005, 09:26 AM tedstryk Hard to tell. It is sort of like Pre-Cassini Tita... Apr 21 2005, 09:51 AM Richard Trigaux QUOTE (tedstryk @ Apr 21 2005, 09:51 AM)It is... Jun 26 2005, 08:06 AM BruceMoomaw I can dig up some stuff on this for you, given a l... Jun 23 2005, 12:06 AM remcook I believe the spectral 'windows' are much ... Jun 25 2005, 08:28 PM edstrick My understanding is that the topographically relat... Jun 26 2005, 07:02 AM edstrick On Cassin, the VIMS is the best instrument we coul... Jun 26 2005, 10:31 AM Bob Shaw QUOTE (edstrick @ Jun 26 2005, 11:31 AM)On Ca... Jul 8 2005, 01:59 PM JRehling QUOTE (edstrick @ Jun 26 2005, 03:31 AM)On Ca... Jul 8 2005, 02:23 PM Gsnorgathon I suppose it's possible, if not easy, to subtr... Jul 9 2005, 04:10 AM JRehling QUOTE (Gsnorgathon @ Jul 8 2005, 09:10 PM)I s... Jul 9 2005, 05:09 AM maycm An update....though not much new information.
htt... Jul 8 2005, 12:49 PM TheChemist Venus Express arrives in Baikonur
She's got i... Aug 10 2005, 04:33 PM Bob Shaw QUOTE (TheChemist @ Aug 10 2005, 05:33 PM)Ven... Aug 10 2005, 07:42 PM BruceMoomaw Here's my long-promised entry on whatever I... Aug 29 2005, 02:10 AM BruceMoomaw Two more notes:
(1) The VIRTIS team is fully re... Aug 29 2005, 02:15 AM tedstryk http://messenger.jhuapl.edu/the_mission/im...ine_f... Sep 11 2005, 01:35 PM 4th rock from the sun QUOTE (tedstryk @ Sep 11 2005, 02:35 PM)...
... Sep 12 2005, 08:46 PM tedstryk Well, I doubt there would be time-lapse images. T... Sep 12 2005, 09:59 PM mike America will just have to make a new probe that re... Sep 12 2005, 07:08 PM Bob Shaw QUOTE (mike @ Sep 12 2005, 08:08 PM)America w... Sep 12 2005, 09:04 PM TheChemist QUOTE Oh, and the thing that the ESA Press Office ... Sep 13 2005, 11:52 AM tedstryk QUOTE (TheChemist @ Sep 13 2005, 11:52 AM)... Sep 13 2005, 03:01 PM RNeuhaus New update. Now it is less than 14 days from launc... Oct 12 2005, 04:09 AM ljk4-1 Preparations for ESA's Venus Express mission p... Oct 13 2005, 01:50 PM RNeuhaus The spacecraft Technical details
Spacecraft fact... Oct 13 2005, 02:45 PM um3k QUOTE (RNeuhaus @ Oct 13 2005, 10:45 AM)The p... Oct 13 2005, 03:03 PM Rakhir QUOTE (um3k @ Oct 13 2005, 05:03 PM)I'm n... Oct 14 2005, 08:23 AM Rakhir QUOTE (RNeuhaus @ Oct 13 2005, 04:45 PM)The s... Oct 13 2005, 04:03 PM RNeuhaus QUOTE (Rakhir @ Oct 13 2005, 11:03 AM)From ht... Oct 13 2005, 04:46 PM tedstryk QUOTE (RNeuhaus @ Oct 13 2005, 04:46 PM)Thank... Oct 13 2005, 05:06 PM ugordan QUOTE (RNeuhaus @ Oct 13 2005, 06:46 PM)Thank... Oct 13 2005, 05:09 PM RNeuhaus The problem was already solved by changing the pro... Oct 13 2005, 06:25 PM Jeff7 QUOTE (um3k @ Oct 13 2005, 10:03 AM)I'm n... Oct 14 2005, 04:22 AM helvick QUOTE (Jeff7 @ Oct 14 2005, 05:22 AM)I think ... Oct 14 2005, 08:15 AM RNeuhaus QUOTE (Jeff7 @ Oct 13 2005, 11:22 PM)I think ... Oct 14 2005, 03:59 PM RNeuhaus According to the VE's pdf document, VE has gre... Oct 14 2005, 04:22 PM dvandorn Your diagram shows the most common Hohmann transfe... Oct 15 2005, 08:59 AM Rakhir Fairing Installation
Today, Monday 17 October 200... Oct 17 2005, 08:25 PM RNeuhaus New updates about Venus Express. More details abou... Oct 19 2005, 10:30 PM Rakhir New ESA update : summary of the launch, cruise and... Oct 21 2005, 11:03 AM Adam Delayed:
http://www.esa.int/esaCP/SEM0CV3J2FE_ind... Oct 21 2005, 06:31 PM Rakhir Venus Express preliminary investigations bring enc... Oct 25 2005, 11:33 AM SigurRosFan Spaceflightnow Mission Status Center: Venus Expres... Oct 26 2005, 01:27 PM Rakhir Russian space officials Monday set a Nov. 9 blasto... Oct 31 2005, 05:21 PM RNeuhaus Strange news.
The postpone of the launch was due... Oct 31 2005, 09:23 PM Rakhir QUOTE (RNeuhaus @ Oct 31 2005, 11:23 PM)Stran... Oct 31 2005, 10:24 PM Rakhir Roll Out to Launch Pad
http://sci.esa.int/science... Nov 5 2005, 04:42 PM Rakhir Pre-launch sequence was executed.
2 days...
http:... Nov 6 2005, 11:24 PM paulanderson Interesting article:
'Venus Mission May Hold ... Nov 7 2005, 01:35 AM mike If Venus is almost exactly like Earth, but much ho... Nov 7 2005, 03:04 AM JRehling QUOTE (mike @ Nov 6 2005, 08:04 PM)If Venus i... Nov 7 2005, 03:41 PM ljk4-1 QUOTE (RNeuhaus @ Nov 7 2005, 11:26 AM)Intere... Nov 7 2005, 04:30 PM JRehling QUOTE (ljk4-1 @ Nov 7 2005, 09:30 AM)Act... Nov 7 2005, 05:26 PM The Messenger QUOTE (JRehling @ Nov 7 2005, 10:26 AM)There ... Nov 7 2005, 05:46 PM ljk4-1 QUOTE (JRehling @ Nov 7 2005, 12:26 PM)There ... Nov 7 2005, 10:08 PM imran Less than one hour from launch!
Live webcast ... Nov 9 2005, 02:41 AM jamescanvin QUOTE (imran @ Nov 9 2005, 01:41 PM)Less than... Nov 9 2005, 03:11 AM imran Both webcasts are working now although you get bet... Nov 9 2005, 03:22 AM imran 0327 GMT (10:27 p.m. EDT Tues.)
The Venus Express... Nov 9 2005, 03:30 AM imran QUOTE (imran @ Nov 9 2005, 03:30 AM)0327 GMT ... Nov 9 2005, 03:32 AM jamescanvin QUOTE (imran @ Nov 9 2005, 02:22 PM)Both webc... Nov 9 2005, 03:33 AM imran QUOTE (jamescanvin @ Nov 9 2005, 03:33 AM)Sta... Nov 9 2005, 03:33 AM jamescanvin QUOTE (imran @ Nov 9 2005, 02:33 PM)LIFTOFF... Nov 9 2005, 03:38 AM jamescanvin QUOTE (jamescanvin @ Nov 9 2005, 02:38 PM)OK ... Nov 9 2005, 03:39 AM imran 0336 GMT (10:36 p.m. EDT Tues.)
T+plus 3 minutes.... Nov 9 2005, 03:38 AM JRehling QUOTE (ljk4-1 @ Nov 7 2005, 03:08 PM)The... Nov 9 2005, 06:12 AM djellison Moons tend to orbit their parent planet in the sam... Nov 7 2005, 04:57 PM BruceMoomaw Well, as Chesterton said, the most remarkable thin... Nov 7 2005, 09:20 PM RNeuhaus Anyway, at the beginning of the planetary formatio... Nov 7 2005, 09:57 PM Waspie_Dwarf Alternative link for the live webcast of the launc... Nov 9 2005, 03:06 AM jamescanvin QUOTE (Waspie_Dwarf @ Nov 9 2005, 02:06 PM)Al... Nov 9 2005, 03:14 AM Waspie_Dwarf The live feed won't start until 03:28 GMT, at ... Nov 9 2005, 03:14 AM imran Cutoff of 3rd stage and separation of nose module. Nov 9 2005, 03:41 AM jamescanvin QUOTE (imran @ Nov 9 2005, 02:41 PM)"Eve... Nov 9 2005, 03:42 AM imran QUOTE (jamescanvin @ Nov 9 2005, 03:42 AM)Thi... Nov 9 2005, 03:43 AM imran There goes the feed. Oh well..guess I'll have... Nov 9 2005, 03:46 AM imran 0348 GMT (10:48 p.m. EDT Tues.)
T+plus 15 minutes... Nov 9 2005, 03:51 AM elakdawalla Argh! Is that second Fregat burn happening or... Nov 9 2005, 05:02 AM jamescanvin From Spaceflightnow.com
0514 GMT (12:14 a.m. EST)... Nov 9 2005, 05:16 AM Bricktop From http://sci.esa.int/science-e/www/object/in...... Nov 9 2005, 05:19 AM jamescanvin Fregat burn should be underway by now.
No word on... Nov 9 2005, 05:06 AM Waspie_Dwarf QUOTE (jamescanvin @ Nov 9 2005, 05:16 AM)Fro... Nov 9 2005, 05:20 AM Rakhir From http://sci.esa.int/science-e/www/object/in...... Nov 9 2005, 05:20 AM Waspie_Dwarf QUOTE (Bricktop @ Nov 9 2005, 05:19 AM)From h... Nov 9 2005, 05:22 AM jamescanvin Hurrrah!
Venus here we come Nov 9 2005, 05:25 AM elakdawalla This from Daniel Fischer: "Just to report tha... Nov 9 2005, 05:48 AM Rakhir MET: +02h 40m
Sun acquisiton and successfully depl... Nov 9 2005, 06:17 AM Decepticon QUOTE Venus Orbit Insertion on April 11, 2006.... Nov 9 2005, 07:03 AM edstrick "Sun acquisiton and successfully deployment o... Nov 9 2005, 07:06 AM |
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