Flowing Water Present On Mars, Say Scientists.
(https://s.yimg.com/bt/api/res/1.2/qn98YJLh9TPuu5uQbqjuzw--/YXBwaWQ9eW5ld3NfbGVnbztjaD0xMTUyO2NyPTE7Y3c9MjA0ODtkeD0wO2R5PTA7Zmk9dWxjcm9wO2g9MzU1O2lsPXBsYW5lO3E9NzU7dz02MzA-/http://media.zenfs.com/en_uk/News/skynews/10711061-1-1-2048x1152-20150928-161518-351.jpg)
Flowing liquid water, essential to life, is almost certainly present on Mars, scientists believe.
Experts think water is responsible for mysterious features on Mars that change with the seasons.
A new high resolution technique has revealed gully-like features at four locations, known as recurring slope lineae (RSL), contain salt minerals that precipitate from briny water.
The salts, which are not found in the surrounding terrain, are thought to have been left by water flowing down the sides of hills or crater rims.
If the discovery is confirmed it has far-reaching implications for the chances of finding life on Mars and future human exploration.
Writing in the journal Nature Geoscience, the scientists concluded: "Our findings strongly support the hypothesis that recurring slope lineae form as a result of contemporary water activity on Mars.
"Water is essential to life as we know it. The presence of liquid water on Mars today has astrobiological, geologic and hydrologic implications and may affect future human exploration."
The research is based on an analysis of images taken from the American space agency NASA's Mars Reconnaissance Orbiter spacecraft.
Studying the different wavelengths of reflected light gives a chemical "fingerprint" of what a substance is made up of.
The Mars scientists developed an enhanced technique that allowed chemical signatures to be taken from individual image pixels, providing a much higher level of resolution than could previously be achieved.
The researchers detected signatures of hydrated minerals on slopes where darkish streaks on the Red planet appeared to ebb and flow over time.
John Grunsfeld, astronaut and associate administrator of NASA's Science Mission Directorate in Washington, said: "Our quest on Mars has been to 'follow the water,' in our search for life in the universe, and now we have convincing science that validates what we've long suspected.
"This is a significant development, as it appears to confirm that water - albeit briny - is flowing today on the surface of Mars."
https://uk.news.yahoo.com/flowing-water-present-mars-scientists-151016860.html?vp=1#gOn1qal
Evidence of brine 'flows' on Mars: water study.
(http://l1.yimg.com/bt/api/res/1.2/2GF2zCJVdpTND3MrtcNRoA--/YXBwaWQ9eW5ld3NfbGVnbztmaT1maWxsO2g9NDk3O2lsPXBsYW5lO3B5b2ZmPTA7cT03NTt3PTk2MA--/http://media.zenfs.com/en_us/News/afp.com/Part-PAR-Par8287219-1-1-0.jpg)
Curious lines running down slopes on the Martian surface may be streaks of super-salty brine, said the latest findings Monday in the scientific quest for extra-terrestrial liquid water, a prerequisite for life.
A team from the United States and France said it found evidence in the lines of "hydrated" salt minerals, which require water for their creation.
These results "strongly support the hypothesis" of liquid water on Mars today, concluded a research paper published in the journal Nature Geoscience.
Astrophysicists have long hypothesised that the seasonal streaks, dubbed "recurring slope lineae" (RSL), may be formed by brine flows on the Red Planet.
The lines, up to a few hundred metres in length and typically under five metres (16 feet) wide, appear on slopes during warm seasons, lengthen, then fade as they cool.
But spacecraft images have not been detailed enough to probe what is within the lines -- the pixel resolution is coarser than the width of the streaks.
View galleryA handout image made available by NASA on September …
A handout image made available by NASA on September 27, 2015, shows dark, narrow, 100 meter-long str ...
In April, scientists reported in the same journal that perchlorate salts, like the ones in the new study, were "widespread" on the surface of our planetary neighbour and humidity and temperature conditions just right for salty brines to exist.
Perchlorate is highly absorbent and lowers the freezing point of water so that it remains liquid at colder temperatures.
The new study found signs of these same salts in the enigmatic streaks.
"What our paper does is further substantiate that theoretical possibility" of liquid brines on Mars, co-author Lujendra Ojha of the Georgia Institute of Technology in Atlanta told AFP by email.
- 'Almost' proof -
View galleryA team from the United States and France said it found …
A team from the United States and France said it found evidence on Mars of the lines of "hydrat ...
The team devised a method to extract more data from individual pixels in images from the CRISM spectrometer instrument on NASA's Mars Reconnaissance Orbiter, and found details "consistent with the presence of hydrated salt minerals that precipitate (crystallise) from water," according to a Nature press release.
"The findings strongly suggest a link between the transient streaks on Martian slopes and the flow of liquid brines," it added.
Asked if the data was unequivocal proof of liquid water on Mars, another of the study authors, Alfred McEwen from the University of Arizona, told AFP: "I would say almost".
But if there was, it was likely "wet soil, not free water sitting on the surface," he said by email.
It is widely accepted that the Red Planet once hosted plentiful water in liquid form, and still has water today, albeit frozen in ice underground.
Earlier this year, NASA said almost half of Mars' northern hemisphere had once been an ocean, reaching depths greater than 1.6 kilometres (one mile).
But 87 per cent of the precious substance was lost to space.
http://news.yahoo.com/evidence-brine-flows-mars-water-study-152034511.html
Been there Done that back in 2005 :P
(http://www.fossweb.com/delegate/ssi-foss-ucm/Contribution%20Folders/FOSS/multimedia/Planetary_Science/binders/images/fullsize/marmgs_pia09028_fig1_anno.jpg)
ESA Says: Frozen lake on Mars...
(http://planets.ucla.edu/wp-content/uploads/2011/12/rp-mars.jpg)
Re: Flowing Water Present On Mars, Say Scientists
Well, how about that? For a long time now I have wondered what in the Mars could all of that white stuff at each of the polar poles be?? (TIC) Even the Google Mars shows white stuff at the poles, as do the Mars Orbiter photos! While NASA seems to not be discussing that such in this bit of news release, is it even slightly possible that the polar white stuff might actually be some sort of water ice too - and when it melts it too maybe flows somewhere??
Yes, NASA has talked about frost and ice at the poles in some of their Mars Orbiter photo descriptions, but why can't they bring themselves to simply and more broadly talk about actual water existing on the planet?
Small steps I guess? It is this such that any endeavor like the Mars One Project must know about, so they can make some plans for how to choose a permanent location that is near to expected water sources. 8)
And the Google Pole pics (which should be OK for point on little piece of thought :) ).
Mars North Pole
(http://s23.postimg.org/iboffsw57/Screen_Shot_2015_09_28_at_2_49_03_PM.jpg)
Mars South Pole
(http://s15.postimg.org/8fn94yja3/Screen_Shot_2015_09_28_at_2_54_26_PM.jpg)
Quote from: zorgon on September 28, 2015, 08:29:40 PM
Been there Done that back in 2005 :P
Confirmation is always a good thing. :)
QuoteESA Says: Frozen lake on Mars...
Frozen water is not flowing water, the presence of frozen water was know for a long time.
"Z",
As the Article seemed to have appeared today, I assumed that they were maybe only just officially confirming it.
It is Interesting however what you shown in the posted photo that
shows the new deposit of what seems like liquid flow in the 2005 photo in comparison to the 1999 one.
I could not recall seeing the photos at the time or maybe just was not paying attention with so many topics and info floating around on PRC..I couldn't recall if you had suggested being almost certain flowing water was on Mars ..but was well aware of the suggested frozen icecaps being water / ice.
As ArMaP says it is good if they have now confirmed it.
Quote from: ArMaP on September 28, 2015, 10:07:03 PM
Confirmation is always a good thing. :)
Frozen water is not flowing water, the presence of frozen water was know for a long time.
Quote from: astr0144 on September 28, 2015, 11:30:49 PM
As the Article seemed to have appeared today, I assumed that they were maybe only just officially confirming it.
NASA had a press conference today to present this information.
QuoteI could not recall seeing the photos at the time or maybe just was not paying attention with so many topics and info floating around on PRC..I couldn't recall if you had suggested being almost certain flowing water was on Mars ..but was well aware of the suggested frozen icecaps being water / ice.
I have been following this since Mars Reconnaissance Orbiter has been sending higher resolution photos of sites like that. In these cases the scientists thought it was some kind of liquid flow (there are a different kind of flows that get wider closer to the bottom instead of getting thinner, and they think those are sand), but they didn't have any confirmation of what it was.
QuoteAs ArMaP says it is good if they have now confirmed it.
And that's why I think this is great news. :)
One thing about those flows is that they appear to come from a specific layer a few metres (or centimetres) below the surface, so now that they are sure this is briny water they can start looking for the possible sources.
Flowing water on Mars they say?
No foolin huh? ::)
(click on image for full size)
(http://mars.nasa.gov/images/mars-globe-valles-marineris-enhanced.jpg)
I am more surprised that anyone would be surprised there would be liquid water on Mars.
Quote
Temperature:
The temperature on Mars may reach a high of about 70 degrees Fahrenheit (20 degrees Celsius) at noon, at the equator in the summer, or a low of about -225 degrees Fahrenheit (-153 degrees Celsius) at the poles. Obviously this is very inhospitable for humans, but it is also of some concern for the electronics and mechanical parts of a Mars airplane and its instrumentation. In the mid-latitudes, the average temperature would be about -50 degrees Celsius with a nighttime minimum of -60 degrees Celsius and a summer midday maximum of about 0 degrees Celsius.
http://www.quest.nasa.gov/aero/planetary/mars.html (http://www.quest.nasa.gov/aero/planetary/mars.html)
Even if the temperature was 0 degrees Celsius...if you add salt to the mix you have just changed it's melting point depending on the concentration.
The problem is not the temperature, it's the pressure.
As a pressure-cooker reaches higher temperatures because of the pressure, a lower pressure results in a lower boiling temperature (that was the old method used to know the altitude, the time it would take for a specific amount of water to boil in specific conditions), and at the atmospheric pressure present on Mars water boils at the surface temperature, so pure water, theoretically, cannot exist on Mars' surface.
Quote from: ArMaP on September 28, 2015, 10:07:03 PM
Frozen water is not flowing water, the presence of frozen water was know for a long time.
Good grief Charlie Brown!!! :P If you have FROZEN WATER and temperatures that reach 80 degree Fahrenheit in the summer... you will have LIQUID WATER
Is that really so hard to contemplate?
Quote from: astr0144 on September 28, 2015, 11:30:49 PM
"Z",
As the Article seemed to have appeared today, I assumed that they were maybe only just officially confirming it.
QUESTION Does ANYONE actually READ an article? :P
First sentence from NASA:
New findings from NASA's Mars Reconnaissance Orbiter (MRO) provide the strongest evidence yet that liquid water flows intermittently on present-day Mars.http://www.jpl.nasa.gov/news/news.php?feature=4722
"STRONGEST EVIDENCE YET" Not proof not confirmation, just stonger evidence. :P Peopl on Facebook are saying Curiosity Rover found this 'water" No it didn't :P
QuoteI could not recall seeing the photos at the time or maybe just was not paying attention with so many topics and info floating around on PRC..I couldn't recall if you had suggested being almost certain flowing water was on Mars ..but was well aware of the suggested frozen icecaps being water / ice.
One of the biggest sections on the Livingmoon is the issue of WATER on Mars Back at ATS we even had BlueBird, a real scientist that made a bif deal about the water issue. All those pages have been copied to the livingmoon :P
Here is the list from the Bluebird Files (She was goinf to do Venus next but suddenly vannished and all her images and files with her from ATS Fortunately we had the Mars stuff)
Search for Water:
Lakes on Mars
Lakes on Mars - R07-01100
Dry River Canyons
Is There Liquid Water on Mars? - Page 1 - Bluebird Files
Is There Liquid Water on Mars? - Page 2 - Bluebird Files
Is There Liquid Water on Mars? - Page 3 - Bluebird Files
Is There Liquid Water on Mars? - Page 4 - Bluebird Files
Is There Liquid Water on Mars? - Page 5 - Bluebird Files
Mars Was a Water World
Martian Rivers
New Lake on Mars? - ESA finds Water Ice lake in Crater
River Delta - Distributory Fan Near Holden Crater - PIA04869
Ice Discovered:
Disappearing Ice - Phoenix Lander - Sol 20 and Sol 24
Huge Ice Deposits Cover South Pole
Glacier at Base of Olympus Mons Volcano
Pack Ice Spotted Near the Mars Equator
Ice and Water: ESA Mars Express Images
Hebes Chasma, a Trough in the Grand Canyon of Mars
Ice and Dust at Martian North Pole
Ice Lake Found on Mars
Polar Water-Ice Caps on Mars
Strange Deposits Seen on Mars
Water Discovered:
Evidence for Recent Water on Mars
Collection of Articles about Water on Mars
New Deposit - Centauri Montes Region
New Deposit - Crater in Terra Sirenum
Water Once Filled Mars Opportunity Rover Landing Site
http://www.thelivingmoon.com/43space_anomalies/index.html
QuoteAs ArMaP says it is good if they have now confirmed it.
I repeat :P
New findings from NASA's Mars Reconnaissance Orbiter (MRO) provide the
strongest evidence yet Not exactly confirmation :P
Maybe there is OIL there too :P
(http://www.thelivingmoon.com/43ancients/04images/Mars4/Geysers/S18_02576_2006_08_16.gif)
(http://www.thelivingmoon.com/43ancients/04images/Mars2/Shadow01.png)
(http://www.thelivingmoon.com/43ancients/04images/Mars2/Shadow02.png)
(http://www.thelivingmoon.com/43ancients/04images/Mars2/Shadow03.png)
(http://www.thelivingmoon.com/43ancients/04images/Mars4/Geysers/Geyser_Art_01.jpg)
Quote from: zorgon on September 29, 2015, 05:29:20 AM
Good grief Charlie Brown!!! :P If you have FROZEN WATER and temperatures that reach 80 degree Fahrenheit in the summer... you will have LIQUID WATER
Not if the pressure makes the water evaporate instantly.
QuoteIs that really so hard to contemplate?
Apparently. :)
I maybe wrong but I think a lot of people (including me) have difficulty in understanding the variations between various states of matter and the effects of various pressures...as well as the effects of Altitude or Atmospheric pressure on various matter on the various elements or compounds.
The States of Matter (I assume Matter could be any Element)or a Substance....and the usual States refer to a Element or substance being either a SOLID, LIQUID , or GAS or vapour.
In this particular example...the Matter Involved is the elements and /or compounds that make up Water as we describe in its element and compound terms as H2O...a combination of the main two elements being Hydrogen and Oxygen.
Then we have Atmospheric Pressure which as I basically understand it is related to the weight of the air or what ever gas like elements that act down on a planets surface (which varies from Flat to high mountains)or its sea level such as on our Earth or depending upon that the given weight of the gases involved such as the weight of air that vary at different altitudes.
As we Know in the case of Water... ICE is when it is a SOLID.
Then When it is heated it turns to another state of Matter .. that being a LIQUID. Then if Liquid is heated further or its surrounding pressure altered / lowered.. then that changes its state of Matter again to becoming a Gas.
Then what complicated things for me and maybe I am still not that clear about... is that an Element its self has a given pressure within it...that is known as its Vapor Pressure. that may relate to something known as Brownian Motion.
This description of Vapour Pressure and its effects are what I found a bit difficult to understand but that maybe needed to understand to be able to grasp the overall concept.
Quote
As elevation increases, atmospheric pressure and boiling point decrease.
Boiling point is the point at which vapour pressure equals atmospheric pressure.
In a liquid, some particles always have enough energy to escape to the gas phase.
Gaseous particles are also returning to the liquid.
The vapour pressure is the pressure exerted by the gas when the amount of particles leaving the liquid equals the amount of particles entering the liquid.
As temperature increases, more particles have enough energy to escape to the gas phase.
This increases the vapour pressure. When the vapour pressure equals atmospheric pressure, the liquid boils.
QuoteBrownian motion or pedesis (from Greek: ??????? /p???di?sis/ "leaping") is the random motion of particles suspended in a fluid (a liquid or a gas) resulting from their collision with the quick atoms or molecules in the gas or liquid.
All Elements or Compounds that are substances or fluids are made up of Atoms that contain Electrons.
when Substances or fluids are at certain temperature and pressure conditions, they maybe seen as stable. such as when a substance is a Solid. Their Atomic structure maybe seen as stable and their atoms are more tightly packed together...
But when temperature is increased..or surrounding pressure is altered its Atoms can start to vibrate. and the atoms start to move apart. this is like when Ice melts and starts becoming a liquid.
Generally increasing a Pressure on or within a substance increases its temperature within a substance or fluid... due to the increase in vibration and movement within or of its particles..ie atoms.
Moving atoms or particles are higher in temp than stable ones.
as they have more or create more energy.
ie more or increased pressure = higher or increased temperature.
But Just how the increased pressure effects a Substances boiling point alone I am not sure.
then the Altitude and Atmospheric Pressure also effect it..
but generally....
Then if the temperature is increased further.. the atoms vibrate a lot more collide with each other and spread apart further from each other..within a given space. This is now as a Liquid changes to becoming a Gas.
so when a substances state of matter changes due to either temperature or surrounding pressure.. we see a Substance or Fluid change as to how it behaves.
Then the effects on this also depend upon what elevation it is at on a Planet above its sea level in case of that on Earth .
The Altitude that a substance is at, effects the amount of acting Atmospheric pressure upon it.
So at Sea Level..we have more or a greater atmospheric pressure or weight of air and other gases within our atmosphere that act upon the substance...
The Atmosphere is between the Surface of the Earth and its boundary to space.. There is More atmosphere contained between sea level and the boundary of space than there is between a High Mountain Top and space. there fore the weight of the amount of Atmosphere varies between these two examples.
This would alter the effect of Atmospheric pressure at various altitudes on Earth or any planet.
Pressure is a given mass or weight acting on a given Surface area.
SO in this case we are talking the mass or weight of the above atmospheres weight of air ( or whatever other mixed gases it may contain) that acts upon a surface area.
In our egs of boiling water...maybe seen as the surface area of the Water say within a container or say a pan or kettle that would boil it.. which compared to the amount of atmospheric weight of the above atmosphere is very small in comparison.
so we get a very large weight acting on a very small area..
Many may not realise just how heavy the atmosphere is or how heavy air or gases can be..
because air is invisible or a gas and transparent, we may not realize that it has a weight.. ALL Elements have various weights.
and this also applies to them when in a Gas State of their Matter.
and the amount of air between the surface of the earth and space above a given area is HUGE... and its weight is also HUGELY heavy. Many times heavy than an individual.
so this is huge amount of pounds (or KGs ) acting per square inch (or metres Square)
Area is equal to Length x breadth say for eg in a square box.
in a circular surface area thing such as a round object say like a Pan.. its Surface area maybe calculated as Pi R squared.
or A=Pi x r2
R = the radius of the Pan.. which is half its diameter.
and for those who may have forgot.. Pi is a mathematical number used when calculating round or circular areas .
I am not sure however if we should take the area being acted upon as a Volume rather than a area with effects of taking the surface area into consideration.
Volume is Length x Breadth x height. for a CUBE..
or for a Rounded Cylinder like a pan..
would be pi x r 2 x H or Pi x R squared X Height.
or for the Volume a rounded sphere..if the volume of liquid was of a sphere..
(http://www.mathopenref.com/images/spherevolume/Equation-1.jpg)
but if you then take that same substance say to the top of a mountain like Mount Everest.. you have LESS atmosphere above it..and hence less atmospheric pressure acting upon it.
so the atmospheric pressure is classed as being much less or much lower pressure acting upon it.
This allows a substance to then be able to changes its state in terms of the effects of pressure.
So in this case a Substance or Fluid may Boil at lower temperatures than its normal boiling point. and may do so if its surrounding temperature was the same in each case.. ie at Sea level and at the top of a High Mountain... but as you know... usually higher elevations are cooler or lower in temperature than Standard seal level at most parts of the planet..other than maybe the Poles.
BUT at the same time... its surrounding temperature may vary and be colder. and this may then alter as to what temperature that it will then boil at...
Generally I think at higher elevations its the pressure effects of the atmosphere that effect substance or fluids boiling point at higher elevations rather than it being at a lower temperature.
It is quite a complex thing to understand and grasp IMO...
More info and description about Atmospheric Pressure and Vapor Pressure and effects of Altitude and boiling point.
QuoteAs elevation increases, atmospheric pressure and boiling point decrease.
Explanation:
Boiling point is the point at which vapour pressure equals atmospheric pressure.
In a liquid, some particles always have enough energy to escape to the gas phase. Gaseous particles are also returning to the liquid.
The vapour pressure is the pressure exerted by the gas when the amount of particles leaving the liquid equals the amount of particles entering the liquid.
As temperature increases, more particles have enough energy to escape to the gas phase. This increases the vapour pressure. When the vapour pressure equals atmospheric pressure, the liquid boils.
As elevation increases, atmospheric pressure decreases because air is less dense at higher altitudes.
Because the atmospheric pressure is lower, the vapour pressure of the liquid needs to be lower to reach boiling point.
Therefore, less heat is required to make the vapour pressure equal to the atmospheric pressure. The boiling point is lower at higher altitude.
QuoteNot if the pressure makes the water evaporate instantly.
Ridley Scott director for the new mars movie said he was told of this water by NASA months ago.
Then there was 1877 when Italian astronomer Giovanni Schiaparelli who announced Martian canali. Later Percival Lowell announced the same canals. So, canals must mean water.
Mars is the planet of war which is a good name for a fractured world destroyed by advanced weaponry.
(http://s29.postimg.org/fm3ejqu6f/Mars_canali.jpg)
Edit to ad pic
I didnt check marsanomalyresearch for really a long time.
But talking about water.
What to make of this?
Standing water? 8)
(http://www.marsanomalyresearch.com/evidence-reports/2014/239/1-239-context.jpg)
link: http://www.marsanomalyresearch.com/evidence-reports/2014/239/mhli-anomalies-4.htm (http://www.marsanomalyresearch.com/evidence-reports/2014/239/mhli-anomalies-4.htm)
Quote from: Gigas on September 30, 2015, 03:14:45 AM
Ridley Scott director for the new mars movie said he was told of this water by NASA months ago.
Yesterday I found a NASA page (http://www.jpl.nasa.gov/spaceimages/details.php?id=PIA17934) from last year that, apparently, shows one of the images used on the paper that resulted in this week's press conference, so they probably knew about this for a relatively long time.
Also, the Nature site where I found the published paper (http://www.nature.com/articles/ngeo2546.epdf?referrer_access_token=G202pDRrYSUtVFxbUFS_Y9RgN0jAjWel9jnR3ZoTv0PDgo3lQUDL4ARJHnZcnZ5ad2W5w5yULB9k9rVbdHfjVt-JgAUeIb_GjAhNAHBd5ujgDL8jg0MP7wx1EgY_JUwjlY0OFtUjb0eBrXbLYJJLnH75X9QuUc7EaBCfrqvErFTPZ5lnM16B3O5Z3RZBm2cFa1aOlLW3Zz-64Fpw4kb00_EtlRdAqZ92R7vmnK4h-7s%3D&tracking_referrer=www.theguardian.com) says that the paper was sent to them in April and considered good for publishing in August, so, for the scientific world, it looks like old news.
PS: I will add the links later, I don't have the time now. :)
Edited to add the links and to say that the image on that NASA page was used in a previous paper from Lujendra Ojha, the graduate student of the Georgia Institute of Technology that is the main author of this paper published on Monday.
Quote from: Lunica on September 30, 2015, 07:10:12 AM
I didnt check marsanomalyresearch for really a long time.
But talking about water.
What to make of this?
Standing water? 8)
(http://www.marsanomalyresearch.com/evidence-reports/2014/239/1-239-context.jpg)
link: http://www.marsanomalyresearch.com/evidence-reports/2014/239/mhli-anomalies-4.htm (http://www.marsanomalyresearch.com/evidence-reports/2014/239/mhli-anomalies-4.htm)
Lunica, thanks for the input on this! Although I am a strong advocate for there bring lots of "stuff" on Mars, I just cannot see any liquid water in this pic. Also, to me, the water area noted in the pic has a sloping appearance, and if so, would not retain water anyway. But, there does seem to be a lot of fine sand on the surface in the area, which could be relative to flowing water deposits. :)
(http://mars-news.de/news/mero088_framh.jpg)
Quote from: zorgon on October 03, 2015, 10:02:16 AM
(http://mars-news.de/news/mero088_framh.jpg)
Nothing to see here, move along folks. Keep moving.
Quote from: SerpUkhovian on October 03, 2015, 11:53:59 AM
Nothing to see here, move along folks. Keep moving.
There are several things to see on that photo, but not water.
When they changed the coloration from red to blue, it sure made it look like a puddle of water. I think it is significant that the rover did not drive through the crater, like there was concern it may become stuck.
Quote from: SerpUkhovian on October 03, 2015, 01:29:55 PM
When they changed the coloration from red to blue, it sure made it look like a puddle of water.
That's the problem with colour, people associate colours to things and, when seeing something with a similar colour think they are looking at the same thing without thinking.
Water is transparent, the colour of the photo shouldn't make a difference.
QuoteI think it is significant that the rover did not drive through the crater, like there was concern it may become stuck.
Why would they drive the rover through the crater, specially with all those rocks near the crater rim?
Quote from: zorgon on October 03, 2015, 10:02:16 AM
(http://mars-news.de/news/mero088_framh.jpg)
I certainly am no expert on what I am about to mention, but..............has anyone else given any thought to the Rover tracks? Is that the type of tracks one might expect to see, if driving in "arid-as-desert" sand?? Of course, we do not know the context of normal Martian soil, but to me, these tracks have the appearance of having been made on relatively moist soil. There are a few places in the tracks where it looks as if some of the soil might have stuck to the Rover wheels, and has been lifted out of the track.
Because of the way the tracks do appear to be so firmly well formed, this Martian ground is something other than simple sand, and likely includes some moisture, doncha think?? :)
Quote from: ArMaP on October 03, 2015, 03:55:28 PM
Why would they drive the rover through the crater, specially with all those rocks near the crater rim?
Plus the crater is six meters across. With no depth of field on the two dimensional photograph, the crater looks shallower than it really is. It looks to be over half a meter deep with a steep drop off where the rover drove up. The left wheel went over the edge, and a sensor probably gave the 'too steep' warning prompting the computer to turn the vehicle around.
Quote from: rdunk on October 03, 2015, 04:32:30 PM
Because of the way the tracks do appear to be so firmly well formed, this Martian ground is something other than simple sand, and likely includes some moisture, doncha think?? :)
No, I don't think so. :)
Have you ever worked with cement powder? Being an extremely fine and dry dust, like what we see on Mars, it acts exactly in the same way.
Quote from: ArMaP on September 29, 2015, 12:53:11 AM
The problem is not the temperature, it's the pressure.
As a pressure-cooker reaches higher temperatures because of the pressure, a lower pressure results in a lower boiling temperature (that was the old method used to know the altitude, the time it would take for a specific amount of water to boil in specific conditions), and at the atmospheric pressure present on Mars water boils at the surface temperature, so pure water, theoretically, cannot exist on Mars' surface.
QuoteAt any given location on Earth, the air pressure can vary about 10% whereas on Mars it can vary by as much as 50%. Mars' atmosphere is mostly carbon dioxide and therefore behaves differently than Earth's mostly nitrogen and oxygen atmosphere.
http://quest.nasa.gov/aero/planetary/mars.html
Maybe one of the Rovers took this pic - I do not know whether pixelation is involved in this or not. And no, I do not have the specific link for this photo, as I got it from social network sources! :)
The water on "Mars" does seem to be quite clear!!!! 8)
(http://s2.postimg.org/vi3rx5nrd/Screen_Shot_2015_10_04_at_1_11_24_AM.jpg)
http://www.youtube.com/watch?v=nCUipx1bhWM
https://www.youtube.com/watch?v=nCUipx1bhWM (https://www.youtube.com/watch?v=nCUipx1bhWM)
Cumulative evidence from Mars now indicates that ancient water on mars was ph neutral (conducive for microbial life) and later liquid flows we see were sulfuric acid.
It appears that vulcanism took a much different path than on earth by ejecting corrosive elements which affected the surface and atmosphere of the earlier more placid and richer atmosphere period.