Earth Sciences Forum

Andre · Posted: Tue Jul 24, 2007 8:47 pm Post subject: Venus express

The opener.

The Venus express is orbiting the planet for over a year now

http://www.esa.int/esaCP/SEMZT4N0LYE_index_0.html

The most spectacular find was a strange vortex in the atmosphere on the south pole.

Also the surface temperature is being mapped in order to find if there is active volcanism. I haven't seen any being reported so far. Actually it's very silent about any results, in contrast with the Mars express.

I have a few running predictions following a crazy hypothesis, saying that there is no recent volcanism anymore. Recent as in a few million years.

We'll see.

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hypatia · Joined: 24 Jul 2007 Posts: 7 Location: Michigan USA

Yes, for a program that is already a year old, there is very little information about its findings. Now you have me wondering why?
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Andre · Posted: Wed Jul 25, 2007 7:21 pm Post subject:

Most likely because there is nothing significant to report. I checked the BAUT forums, nothing there either. I have a google alert running on "Venus express", silent.

I guess they have not found that life vulcano which was required to explain the sulphur acid staying aloft in the atmosphere or something like that which is good news since that is consistent with my little idea.

I'm also curiuos about the radiation balance. It has been reported in the past that Venus was emitting more energy than it recieved, also the greenhouse numbers don't add up. You can calculate that with the same sensitivity on Earth the greenhouse temperature would only be some 400F, 150Celsius. Instead the temps are about 470 degrees Celsius while it is inferred that they may have been 1000K:

http://www.lpi.usra.edu/meetings/lpsc2003/pdf/1152.pdf

Now Vicky Hansen states:

Baywax · Joined: 23 Jul 2007 Posts: 113 Location: Pacific West Coast

The silent Venus Express. Could it be there are findings that the planet is only 3600 years old? (don't mind me!)
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NileQueen · Posted: Tue Jul 31, 2007 4:41 pm Post subject:

Andre · Posted: Tue Jul 31, 2007 5:35 pm Post subject:

Hi all, I'm just at the other end of a 500 mile road trip, transferring from one reisdence (Germany) to the other (The Netherlands). This causes changes in priority away from forums. I'll make up tomorrow.

Unlikely that there is a way to detemine that Venus is only a few thousand years old.

Thanks to radar imagery of the Magellan satellite we know the surface of Venus just as well as than that of Earth.

Venus chronology has been intensely studied based on the ~1000 identified meteorite impact craters, compared to those on Earth and moon. This hypothesis concludes, as I recall, a mean surface age of 600 million years, the oldest (Tesserae) terrains being around one billion years old.

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