--- Michael Turner <[EMAIL PROTECTED]> wrote:
> >3.  I was looking at wikipedia's Europa page
> >at http://en.wikipedia.org/wiki/Europa_(moon) and
> >I think there's a problem.  I posted a question
> >about it on the relevant Discussion page, here:
> >
> >  http://en.wikipedia.org/wiki/Talk:Europa_(moon)
> 
> What's the problem?  There was no discussion
> at the indicated page when I looked.  Note that
> it says Europa is the smallest of the Galilean
> moons, not the smallest of Jupiter's moons.


I think that the odd form of that URL may be
causing problems.  Here's what the Discussion
page says:

----

This article states: 


  "It has an outer layer of water ice thought to be
around 100 km 
  thick
then later says: 


  "...based on this and on the calculated amount of
heat generated 
  by Europa's tides it is predicted that the outer
crust of solid 
  ice is approximately 10-30 km thick, which could
mean that the 
  liquid ocean may be as much as 90 km deep
underneath."
Am I correct in assuming that the first number refers
to the thickness of the water AND the ice, combined?
Not just the "water ice"? 

----


I'm pretty sure it's just a mistake, but don't yet
feel qualified to go around fixing encyclopedias, 
even wiki ones.

Thanks much for the other info.  Here's a follow-up
on the eclipse question:  Would any of the sun's
corona be visible from Europa, while the eclipse was 
at maximum effect?  In other words, would Jupiter 
appear just as a black hole in an otherwise starry
sky, or would it appear to have a ring around it?
This is a tougher question, I think, but considering
that Jupiter is much bigger and the sun is much
smaller from that vantage point, I tend to think
there would be nothing visible in that direction
but blackness.  Or perhaps just reflected light from
other moons.


--Mark

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