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Earth has plenty of these ice-rich sand dunes, which tend to form distinctive features, such as overhanging cornices, which cannot form in arid sand. According to the FT some of the best examples can be found in Alaska and Antarctica.By studying high resolution snaps of the Martian surface, Bourke was able to identify many of these features in the North Polar Sand Sea and southern crater dune fields, and so conclude that Mars boasts similar niveo-aeolian deposits.Some of the dunes might contain substantial quantities of water, she predicts. One in particular, which, at four miles long by 1,558 feet high, is the largest dune in the solar system, could be as much as 40 or 50 per cent H2O in its upper layers.
Humanity is never going to give up hope of finding life on Mars...
The new company, 4Frontiers, plans to mine Mars for building materials and energy sources, and export the planet's mineral wealth to forthcoming space stations on the moon and elsewhere.The company also wants to build the first permanent human settlement on Mars, using strictly Martian materials, as early as 2025.The idea is to make Mars a center for needs of the solar system economy, said Bruce Mackenzie, co-founder of 4Frontiers and the company's vice president and outreach director."Mars happens to be a good place for these crucial minerals," said Mackenzie. "You have them all in one spot.""Carbon, nitrogen and hydrogen are all scarce on the moon, but readily available on Mars," said Joseph Palaia, 4Frontiers' other co-founder and vice president of operations and research and development. And while oxygen is available in both locations, "it is easier to extract on Mars," he said.
That erroneous idea, that there are "canals" on Mars came from the descriptions of the Italian astronomer Schiaparelli, who of course, spoke Italian and called them canali, meaning "channels" (not the mascarpone filled dessert, you chowhounds) and English speakers took off too far with the term. "Canal" implies an artifice, a man-made channel, whereas this latter term is more general and includes natural formations.Open channel D, open channel D.
By measuring neutrons, it is possible to calculate the abundance of hydrogen on Mars, thus inferring the presence of water. The neutron detectors are sensitive to concentrations of hydrogen in the upper meter of the surface. Like a virtual shovel "digging into" the surface, the spectrometer allows scientists to peer into this shallow subsurface of Mars and measures the amount of hydrogen that exists there. Since hydrogen is most likely present in the form of water ice, the spectrometer is able to measure directly the amount of permanent ground ice and how it changes with the seasons.
After completing its primary mission, Spirit drove about two miles from its landing site to the Columbia Hills, where it found rocks, older than the lava flows forming the floor of Gusev crater, that contained water-related minerals."Every single rock in the hills has shown alteration by liquid water," Squyres said.
Europe's Mars Express probe may have found evidence for a band of ice that once spanned the Martian equator.
I agree, the presence of liquid water can be reasonably inferred, but there are other compounds that contain hydrogen... I'm not saying that there was never water on Mars, merely that as far as I'm concerned, these are questions yet to be proven... I do think that life on Mars is a pipe dream though... Even if there ever was any, I'm pretty sure it'll be gone by now...
Quote from: prometheus on September 08, 2005, 11:47:22 amI agree, the presence of liquid water can be reasonably inferred, but there are other compounds that contain hydrogen... I'm not saying that there was never water on Mars, merely that as far as I'm concerned, these are questions yet to be proven... I do think that life on Mars is a pipe dream though... Even if there ever was any, I'm pretty sure it'll be gone by now...Aye there are other things that have hydrogen in them, but how many of them are as stable as dihydrogen oxide? (actual question here as i really really hate chemistry), the only thing that comes to mind are CH3 and all them organic compounds, but that wouldn't be to probably on mars me thinks
Gamma Hydra V?Beta Iotia?Talos IV?Do I get my Star Cluster?
Hey, extra credit, man.
thanks for the correction prom... as i said i hate chemistry
Topic: Martian sand dunes full of ice. (Read 6715 times)