Venus Express press conference November 28th, Venus: a more Earth-like planetary neighbour Options

[belleraphon1]

All..

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

[edstrick]

Regarding the lack of magnetic field...

1)
Venus is smaller and less dense then Earth. This is partly, but models indicate not entirely, due to the lower compression of the interior due to the planet's lowre mass.
Venus also has a higher surface temperature than Earth. This raises the starting point for temperatures to rise due to the "geothermal" heat-flow as you go inward.

Models, as of maybe 15 years ago, indicated that Venus probably is not compressed enough and too warm for a solid, crystaline iron inner core to have started forming. This means the liquid core lacks a heat source from the freeze-out of the inner core and is considerably more stagnant than Earth's core, reducing convection that could drive a dynamo.

2)
The surface temperature is above the "curie point" of magnetic minerals that can hold a permanent magnetic field. There can't be magnetic anomalies like on Earth and Mars and the Moon from magnetic minerals in the crust.

these are additional points, adding to but not replacing above discussion of dynamo field generation.