On Jun 25, 2008, at 1:47 PM, [EMAIL PROTECTED] wrote:
In reply to Horace Heffner's message of Sat, 21 Jun 2008 22:49:16
-0800:
Hi,
I wonder what the temperature is? Could the white substance be dry-
ice? (Given
that the atmosphere is primarily CO2).
At:
http://www.jpl.nasa.gov/news/phoenix/release.php?ArticleID=1756
it is said: "The key new evidence is that chunks of bright material
exposed by digging on June 15 and still present on June 16 had
vaporized by June 19. "This tells us we've got water ice within reach
of the arm, which means we can continue this investigation with the
tools we brought with us," said Mark Lemmon of Texas A&M University,
College Station, lead scientist for Phoenix's Surface Stereo Imager
camera. He said the disappearing chunks could not have been carbon-
dioxide ice at the local temperatures because that material would not
have been stable for even one day as a solid."
[snip]
http://www.jpl.nasa.gov/news/phoenix/images.php?fileID=14060
Some of the objects in the above black and white photos appear to
move sideways, not just sublimate. More than just ice? Stuff
growing? Small moving things at the bottom of the photo, just beyond
the end of the trench, look like little balls on top of growing
stalks. The the effect is not just due to a changing sun angle. Two
stalks at the bottom lip of the right hand trench move in opposed
directions.
http://www.jpl.nasa.gov/news/phoenix/release.php?ArticleID=1756
http://www.jpl.nasa.gov/news/phoenix/images.php?fileID=14120
Best regards,
Horace Heffner
http://www.mtaonline.net/~hheffner/
