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Fraser
2005-Nov-04, 05:51 PM
SUMMARY: The European Space Agency's upcoming Venus Express mission to our planet's "evil twin" should reveal a planet of extremes, and more than a few surprises. One question revolves around the identity of a mysterious "unknown ultraviolet absorber", which seems to limit the amount of sunlight that reaches the planet's surface. Scientists are also hoping to find out if the planet still has active volcanoes. Venus Express is due to lift off from the Baikonur Cosmodrome on November 9th and arrive at Venus in April 2006.

View full article (http://www.universetoday.com/am/publish/venus_mission_surprises.html)
What do you think about this story? post your comments below.

Ray Bingham
2005-Nov-05, 01:29 AM
Missed something here. Men are from Mars. Women are from where now.

I know thats not the real subject but when I logged in I lost the article and can't find it without losing the post so... sorry. Try to stay on subject next time.

Ray

Ray Bingham
2005-Nov-05, 01:33 AM
Ok think I got it this time.

Of course we already know it is a planet of extremes. Extreme heat at least.
Wondering how we realy know how much light reaches the surface. Is this probe going to set down on the surface to measure light in its various frequencies.

Ray

GBendt
2005-Nov-05, 01:01 PM
Hi Ray

The probe will not go down to the surface, but stay in its orbit.

The color photos that were taken from previous venus landers on the venus surface allowed to analyse the spectrum of the venus daylight. The composition of that light is well known.

Regards,

Günther

Andre
2005-Nov-06, 09:47 AM
Well I guess it's time to do a few predictions about what the Venus express may discover. I had an old thread on Venus (http://www.bautforum.com/showthread.php?t=10879) with an unusual idea.

I hope that they repeat the radar imagery like Magelan to explore the surface again

if I'm right then Venus is a "cool" planet with a (much) lower thermal gradient than Earth, just about tectonically dead, which would mean little if any active volcanoes, no signs of tectonic activity. And no hot spots on the surface

Furthermore, no carbonate type rocks apart from possible weathering interactions of surface rocks with the atmosphere.

There is also:

"The mystery of Venus' internal heat", New Scientist, Vol. 88, 13 November 1980, p. 437. suggesting that Venus emitted (much) more energy than it absorbed, which has been heavily debated with the apparant end conclusion seemed to be that the instruments must have been wrong. However, it's perfectly logical in my little per idea, so my prediction would be that New Scientist in 1980 was right after all.

Andre
2005-Nov-09, 07:16 AM
Well, it blasted off successfully

The Venus Express on its way (http://news.google.com/news?q=venus+express+launched&hl=en&lr=&ie=UTF-8&sa=N&tab=nn&oi=newsr)