Horace Heffner
Wed, 25 Jun 2008 16:55:13 -0700
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? (Giventhat the atmosphere is primarily CO2).
At: http://www.jpl.nasa.gov/news/phoenix/release.php?ArticleID=1756it 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/