posted on Dec, 16 2008 @ 10:39 PM
Originally posted by Phage
The magnetosphere is not the only protection from the solar wind. Venus has no planetary magnetosphere and has a dense atmosphere. In lieu of a
planetary magnetic field, an induced magnetic field forms, produced by interactions between the solar wind and the ionosphere. It would take a very
long time with no planetary magnetosphere for our atmosphere to be stripped away if it happened at all.
The comparison to Venus may not be valid, I believe Velikovsky was correct in that Venus is a young planet and is still finding electrical
equilibrium. The runaway greenhouse effect is a myth.
Planets with a weak or non-existent magnetosphere are subject to atmospheric stripping by the solar wind.
Venus, the nearest planet to Earth, has an atmosphere 100 times denser than our own. Modern space probes have discovered a comet-like tail that
stretches back to the orbit of the Earth.
Hmm... a cometary tail?
Mars is larger than Mercury and four times farther from the sun, and yet even here it is thought that the solar wind has stripped away up to a
third of its original atmosphere, leaving a layer 100 times less dense than the Earth's. It is believed the mechanism for this atmospheric stripping
is gas being caught in bubbles of magnetic field, which are ripped off by solar winds.
Ewww, I used wikipedia as reference.
It probably would take a long to to strip the atmosphere, but it does happen, it's happening on Mars and Venus as mentioned above.
Solar Wind Rips up Martian Atmosphere
Obseving the atmospheres of Venus and
Mars leaking into space
I'm talking about both UV radiation and high energy particles (both cosmic rays and the high energy particles from the sun). The magnetosphere
does intercept some of these but even if it didn't, the atmosphere still would. The atmosphere can deal with high energy particles better than the
magnetosphere can. Of course, in case of a gamma ray burst or some other truly awesome event, neither our magnetosphere nor our atmosphere would help.
But for the ordinary, everyday stuff, the atmosphere works fine.
Thanks for the clarification, however I'd have to disagree with the Venus comparison. It may have a thick atmosphere but it is still being
It's just a baby is all.
I agree that the atmosphere does serve some protection, but it kind of sounds like your saying that our atmosphere would be fine without the
magnetosphere. As I said before no magnetosphere no atmosphere, (eventually).
I'd also like to mention that this discovery changes conventional views of the interactions with magnetospheres and the solar wind. Even my comment
regarding the polarity of the IMF seems to be no longer valid. So all bets are off.