|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Mars: A Water World? (Warning: This Post Contains 'Science')
PASADENA, California -- Evidence that suggests Mars was
once a water-rich world is mounting as scientists scrutinize data from the Mars Exploration rover, Opportunity, busily at work in a small crater at Meridiani Planum. That information may well be leading to a biological bombshell of a finding that the red planet has been, and could well be now, an extraterrestrial home for life. There is a palpable buzz here at the Jet Propulsion Laboratory (JPL) in Pasadena, California that something wonderful is about to happen in the exploration of Mars. There is no doubt that the Opportunity Mars rover is relaying a mother lode of geological data. Using an array of tools carried by the golf cart-sized robot -- from spectrometers, a rock grinder, cameras and powerful microscopic imager -- scientists are carefully piecing together a compelling historical portrait of a wet and wild world. Where Opportunity now roves, some scientists here suggest, could have been underneath a huge ocean or lake. But what has truly been uncovered by the robot at Meridiani Planum is under judicious and tight-lipped review. Those findings and their implications are headed for a major press conference, rumored to occur early next week -- but given unanimity among rover scientists and agreement on how and who should unveil the dramatic findings. Turns out, even on Mars, a political and ego outcrop hangs over science. Scientific bulls-eye It is clear that Opportunity's Earth-to-Mars hole in one -- bouncing into a small crater complete with rock outcrop -- has also proven to be a scientific bulls-eye. The robot is wheeling about the crater that is some 70 feet (22 meters) across and 10 feet (3 meters) deep. It is also apparent that there is a backlog of scientific measurements that Mars rover scientists working Opportunity have pocketed and kept close to their lab coats. For one, the rover found the site laden with hematite -- a mineral that typically, but not always -- forms in the presence of water. Then there are the puzzling spherules found in the soil and embedded in rock. They too might be water-related, but also could be produced by the actions of a meteor impact or a spewing volcano. A few spheres have been sliced in half and their insides imaged. Patches of these spherules, or "berries" as some call them, have undergone spectrometer exam to discern their mineral and chemistry makeup. Close-up photos of soil and rock have also shown thread-like features and even an oddly shaped object that looks like Rotini pasta. Brew of dissolved salts There is speculation that the soil underneath the wheels of both Spirit and Opportunity rovers contains small amounts of water mixed with salt in a brine. That brew of dissolved salts keeps the mixture well below the freezing point of pure water, permitting it to exist in liquid form. Opportunity has revisited select spots in the outcrop, drawn there, in part, to look for cross-beds -- sedimentary deposits that are formed in beach, river and sand-dune environments. Using its Rock Abrasion Tool (RAT), the rover has carried out several cleaning and grinding sessions on exposed rock outcrop. Cross-beds are patterns of curving lines or traces found within the strata of sandstone and other sedimentary rocks. Cross-bedding indicates the general direction and force of the wind or water that originally laid down the sediments. Right around the corner Opportunity's research is a "work in progress", said Ray Arvidson, deputy principal investigator for the Mars Exploration Rover (MER) project from Washington University in St. Louis. Data is being gathered to present "a coherent story", he said during a press briefing last Thursday. "That story is right around the corner," Arvidson told SPACE.com . "But we need to finish this work in progress, finish the set of experiments, get the data down from the spacecraft, processed and analyzed. Then I think that the story will be known," he said. Arvidson said multiple working hypotheses are still at play. Water is involved, but only on some of the hypotheses. Until coordinated experiments on the outcrop are completed, what the right hypothesis is remains unknown, he added. Severing the umbilical cord Mars exploration using the rovers has allowed on-the-spot "discovery driven science", said MER Deputy Project Scientist Albert Haldeman. He likened the Mars robot work now underway to deep ocean research using remotely operated submersibles. "It turns out that the best way to explore rocks [on Mars] is go look at craters. Mobility buys us the ability to do that. It was the right fit for looking at rocks," Haldeman told SPACE.com . "The discovery from the Microscopic Imager and seeing those spherulesand finding a larger population of spherules and seeing them in the rocks and the outcropthat progression of discovery influences our thinking." Haldeman said the next step will be severing the umbilical cord between Opportunity and the crater it's exploring. The robot would wheel itself out of that site and onto the expansive terrain of Meridiani Planum. "That umbilical cordthat's hard to break. It's more than even just a tension within the science team," Haldeman said. Tantalizing hints Scientists are carefully analyzing the rock data gleaned by the Opportunity rover. "We really want to understand that we've got those figured out right," Haldeman said. Up to now they have offered some "tantalizing hints", he said, that speak to a possible relationship with water. Piecing together the story of what Opportunity has found involves great care and deliberation, Haldeman said, based on a wide-range of viewpoints and levels of expertise. "We want to be cautious," he explained. More to the point, the science output from Mars must withstand scrutiny by experts outside the rover investigation teams. "There are lots of geologists out there who are looking at these pictures and they are starting to drool," Haldeman said. "The American taxpayer that spent $800 million on this deserves a thorough analysis," Haldeman said. Slippery slope leading to life One scientist eagerly awaiting the news from Mars, particularly from Opportunity, is Gilbert Levin. He is Chairman of the Board and Executive Officer for Science of Spherix Incorporated in Beltsville, Maryland. Levin is a former Viking Mars lander investigator. He has long argued that his 1976 Viking Labeled Release (LR) life detection experiment found living microorganisms in the soil of Mars. In 1997, Levin reported that simple laws of physics require water to occur as a liquid on the surface of Mars. Subsequent experiments and research have bolstered this view, he said, and reaffirms his Viking LR data regarding microbial life on Mars. Levin detailed his Mars views in a SPACE.com phone interview and via email. "It's hard to image why such bullet-proof evidence was denied for such a long time, and why those so vigorously denying it never did so by meeting the science, but merely by brushing it away," Levin said. "Of course, now that it must be acknowledged by all that there is liquid water on the surface of Mars," Levin added, "this starts those denying the validity of the Mars LR data down the slippery slope leading to life." Mars mud Levin points to Opportunity imagery that offers conclusive proof of standing liquid water and running water on a cold Mars. Other images show the rover tracks clearly are being made in "mud", with water being pressed out of that material, Levin said. "That water promptly freezes and you can see reflecting ice. That's clearly ice. It could be nothing else," he said, "and the source is the water that came out of the mud." As for the spherical objects found at the Opportunity site, Levin has a thought. "I wonder on Mars if it can rain upwards," he said. The idea is that subsurface water comes up through the soils and then freezes when it gets to the surface. "Maybe these little spherules form just like raindrops form up above," Levin explained. Levin said that brine on Mars is a code word for liquid water. He senses that great care is being taken by rover scientists because the liquid water issue starts the road to life. "That's the monument that they are afraid to erect without real due process," Levin concluded. |
#2
|
|||
|
|||
Mars: A Water World? (Warning: This Post Contains 'Science')
In article , Donald L
Ferrt wrote: DrPostman wrote in message . .. On Thu, 04 Mar 2004 20:54:50 -0600, wrote: On 4 Mar 2004 04:54:51 -0800, (Donald L Ferrt) wrote: STOP ALLL SPACE EXPLORATION NOW! you mean that vast expanse called your skull? Do to the potential for failure to discover anything worthwhile the NIH has canceled all programs involving missions to Protobrain's skull. 3 zeros in a row! Here Protobrain demonstrates his counting abilities. -=-=-=-=- Official AFA-B Bully, Pest, and Gummint Disinformation Agent |
#3
|
|||
|
|||
Mars: A Water World? (Warning: This Post Contains 'Science')
On 5 Mar 2004 14:38:34 GMT, Xaonon wrote in
alt.fan.art-bell: Ned i bach , Donald L Ferrt teithant i thiw hin: Xaonon wrote in message ... Ned i bach , Donald L Ferrt teithant i thiw hin: Now it is your turn! When did any large amount of water on Mars start to become scarce and why? - AKA - where did most of it go? Much of it evaporated off. To retain a given molecule in its atmosphere for long periods of time, a planet's escape velocity must be several times larger than the RMS speed of that molecule---a factor of 10 is a good rule of thumb. Mars, as it happens, is on the wrong side of this critical value. The fact that the planet has basically no magnetosphere probably didn't help either. So, you would say that when the Sun actually heated up and took off, giving such as a strong solar wind, that the oceans of Mars and Venus were doomed? Assuming I'm understanding this train wreck of a sentence properly, no. Venus is massive enough to retain lighter molecules such as water. The fact that it still doesn't have oceans is due to other factors (i.e. being a complete hellhole). Detroit still has water. Explain that! -- V.G. Change pobox dot alaska to gci. "People are more violently opposed to fur than leather, because it is easier to harrass rich women than it is motorcycle gangs." - Bumper Sticker (This sig file contains not less than 80% recycled SPAM) Sarcasm is my sword, Apathy is my shield. |
#4
|
|||
|
|||
Mars: A Water World? (Warning: This Post Contains 'Science')
"Vanilla Gorilla (Monkey Boy)" wrote in message
... On 5 Mar 2004 14:38:34 GMT, Xaonon wrote in alt.fan.art-bell: Ned i bach , Donald L Ferrt teithant i thiw hin: Xaonon wrote in message ... Ned i bach , Donald L Ferrt teithant i thiw hin: Now it is your turn! When did any large amount of water on Mars start to become scarce and why? - AKA - where did most of it go? Much of it evaporated off. To retain a given molecule in its atmosphere for long periods of time, a planet's escape velocity must be several times larger than the RMS speed of that molecule---a factor of 10 is a good rule of thumb. Mars, as it happens, is on the wrong side of this critical value. The fact that the planet has basically no magnetosphere probably didn't help either. So, you would say that when the Sun actually heated up and took off, giving such as a strong solar wind, that the oceans of Mars and Venus were doomed? Assuming I'm understanding this train wreck of a sentence properly, no. Venus is massive enough to retain lighter molecules such as water. The fact that it still doesn't have oceans is due to other factors (i.e. being a complete hellhole). Detroit still has water. Explain that! Detroit still has a human population. Explain that. Jim |
#5
|
|||
|
|||
Mars: A Water World? (Warning: This Post Contains 'Science')
In article , Clave
wrote: "Vanilla Gorilla (Monkey Boy)" wrote in message ... On 5 Mar 2004 14:38:34 GMT, Xaonon wrote in alt.fan.art-bell: Ned i bach , Donald L Ferrt teithant i thiw hin: Xaonon wrote in message ... Ned i bach , Donald L Ferrt teithant i thiw hin: Now it is your turn! When did any large amount of water on Mars start to become scarce and why? - AKA - where did most of it go? Much of it evaporated off. To retain a given molecule in its atmosphere for long periods of time, a planet's escape velocity must be several times larger than the RMS speed of that molecule---a factor of 10 is a good rule of thumb. Mars, as it happens, is on the wrong side of this critical value. The fact that the planet has basically no magnetosphere probably didn't help either. So, you would say that when the Sun actually heated up and took off, giving such as a strong solar wind, that the oceans of Mars and Venus were doomed? Assuming I'm understanding this train wreck of a sentence properly, no. Venus is massive enough to retain lighter molecules such as water. The fact that it still doesn't have oceans is due to other factors (i.e. being a complete hellhole). Detroit still has water. Explain that! Detroit still has a human population. Explain that. "He's a cop killer." -=-=-=-=- Official AFA-B Bully, Pest, and Gummint Disinformation Agent |
#6
|
|||
|
|||
Mars: A Water World? (Warning: This Post Contains 'Science')
On Fri, 5 Mar 2004 21:32:26 -0800, "Clave"
wrote in alt.fan.art-bell: "Vanilla Gorilla (Monkey Boy)" wrote in message .. . On 5 Mar 2004 14:38:34 GMT, Xaonon wrote in alt.fan.art-bell: Ned i bach , Donald L Ferrt teithant i thiw hin: Xaonon wrote in message ... Ned i bach , Donald L Ferrt teithant i thiw hin: Now it is your turn! When did any large amount of water on Mars start to become scarce and why? - AKA - where did most of it go? Much of it evaporated off. To retain a given molecule in its atmosphere for long periods of time, a planet's escape velocity must be several times larger than the RMS speed of that molecule---a factor of 10 is a good rule of thumb. Mars, as it happens, is on the wrong side of this critical value. The fact that the planet has basically no magnetosphere probably didn't help either. So, you would say that when the Sun actually heated up and took off, giving such as a strong solar wind, that the oceans of Mars and Venus were doomed? Assuming I'm understanding this train wreck of a sentence properly, no. Venus is massive enough to retain lighter molecules such as water. The fact that it still doesn't have oceans is due to other factors (i.e. being a complete hellhole). Detroit still has water. Explain that! Detroit still has a human population. Explain that. Jim Your thesis is debatable. -- V.G. Change pobox dot alaska to gci. "People are more violently opposed to fur than leather, because it is easier to harrass rich women than it is motorcycle gangs." - Bumper Sticker (This sig file contains not less than 80% recycled SPAM) Sarcasm is my sword, Apathy is my shield. |
#7
|
|||
|
|||
Mars: A Water World? (Warning: This Post Contains 'Science')
In article , Donald L
Ferrt wrote: DrPostman wrote in message . .. On 5 Mar 2004 14:38:34 GMT, Xaonon wrote: Ned i bach , Donald L Ferrt teithant i thiw hin: Xaonon wrote in message ... Ned i bach , Donald L Ferrt teithant i thiw hin: Now it is your turn! When did any large amount of water on Mars start to become scarce and why? - AKA - where did most of it go? Much of it evaporated off. To retain a given molecule in its atmosphere for long periods of time, a planet's escape velocity must be several times larger than the RMS speed of that molecule---a factor of 10 is a good rule of thumb. Mars, as it happens, is on the wrong side of this critical value. The fact that the planet has basically no magnetosphere probably didn't help either. So, you would say that when the Sun actually heated up and took off, giving such as a strong solar wind, that the oceans of Mars and Venus were doomed? Assuming I'm understanding this train wreck of a sentence properly, no. Venus is massive enough to retain lighter molecules such as water. The fact that it still doesn't have oceans is due to other factors (i.e. being a complete hellhole). You think that's a train wreak of sentence structure? Wait till he throws equal signs all over the place and pretends to write in some sort of strange accent. Evasion to replying to question noted! Form a coherent question and maybe someone will understand what you are asking. -=-=-=-=- Official AFA-B Bully, Pest, and Gummint Disinformation Agent |
#9
|
|||
|
|||
Mars: A Water World? (Warning: This Post Contains 'Science')
In article knK2c.13461$BA.9468@fed1read03, revlove
wrote: "Donald L Ferrt" wrote in message m... DrPostman wrote in message . .. On 5 Mar 2004 14:38:34 GMT, Xaonon wrote: Ned i bach , Donald L Ferrt teithant i thiw hin: Xaonon wrote in message ... Ned i bach , Donald L Ferrt teithant i thiw hin: Now it is your turn! When did any large amount of water on Mars start to become scarce and why? - AKA - where did most of it go? Much of it evaporated off. To retain a given molecule in its atmosphere for long periods of time, a planet's escape velocity must be several times larger than the RMS speed of that molecule---a factor of 10 is a good rule of thumb. Mars, as it happens, is on the wrong side of this critical value. The fact that the planet has basically no magnetosphere probably didn't help either. So, you would say that when the Sun actually heated up and took off, giving such as a strong solar wind, that the oceans of Mars and Venus were doomed? Assuming I'm understanding this train wreck of a sentence properly, no. Venus is massive enough to retain lighter molecules such as water. The fact that it still doesn't have oceans is due to other factors (i.e. being a complete hellhole). You think that's a train wreak of sentence structure? Wait till he throws equal signs all over the place and pretends to write in some sort of strange accent. A strange accent you say? Why I'll keep my eyes peeled. I can't imagine wh at THAT might look like. Surely you've seen a Protobrain post full of 'der's and 've's Rev? It's his cute little way of implying someone is a 'Group Conservo'/Nazi. -=-=-=-=- Official AFA-B Bully, Pest, and Gummint Disinformation Agent |
#10
|
|||
|
|||
Mars: A Water World? (Warning: This Post Contains 'Science')
"Carl R. Osterwald" wrote in message ... In article knK2c.13461$BA.9468@fed1read03, revlove wrote: "Donald L Ferrt" wrote in message m... DrPostman wrote in message . .. On 5 Mar 2004 14:38:34 GMT, Xaonon wrote: Ned i bach , Donald L Ferrt teithant i thiw hin: Xaonon wrote in message ... Ned i bach , Donald L Ferrt teithant i thiw hin: Now it is your turn! When did any large amount of water on Mars start to become scarce and why? - AKA - where did most of it go? Much of it evaporated off. To retain a given molecule in its atmosphere for long periods of time, a planet's escape velocity must be several times larger than the RMS speed of that molecule---a factor of 10 is a good rule of thumb. Mars, as it happens, is on the wrong side of this critical value. The fact that the planet has basically no magnetosphere probably didn't help either. So, you would say that when the Sun actually heated up and took off, giving such as a strong solar wind, that the oceans of Mars and Venus were doomed? Assuming I'm understanding this train wreck of a sentence properly, no. Venus is massive enough to retain lighter molecules such as water. The fact that it still doesn't have oceans is due to other factors (i.e. being a complete hellhole). You think that's a train wreak of sentence structure? Wait till he throws equal signs all over the place and pretends to write in some sort of strange accent. A strange accent you say? Why I'll keep my eyes peeled. I can't imagine wh at THAT might look like. Surely you've seen a Protobrain post full of 'der's and 've's Rev? It's his cute little way of implying someone is a 'Group Conservo'/Nazi. Ne'er seen der post o der P-Brain like dees, but ve'll be on der lookout. ~Reverend Katzanjammer |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Oh dear..... clueless ESA thinks it discovered water on Mars... | Schrodinger333 | Policy | 13 | January 25th 04 05:30 PM |
UFO Activities from Biblical Times | Kazmer Ujvarosy | Astronomy Misc | 0 | December 25th 03 06:21 AM |
Space Calendar - October 24, 2003 | Ron Baalke | History | 0 | October 24th 03 04:38 PM |
Space Calendar - September 28, 2003 | Ron Baalke | History | 0 | September 28th 03 08:00 AM |
Los Alamos Release New Maps Of Mars Water | Ron Baalke | Astronomy Misc | 9 | July 30th 03 04:23 AM |