MARS: CURIOSITY u krateru GALE

Ero wrote:

Jel i to s NASA-ine stranice?

Ovo danas je važno otkriće...Možemo zaključiti da je život moguć i izvan Zemlje...

Ero wrote:

jokerman wrote:

Ero wrote:

kako su kosti mogle prezivjeti radijaciju ?

od kud toliko kraljeznji prsljenovi? znamo da na marsu je gravitacija slabija neg na zemlji, zasto bi kostur eventualnog marsovca imao tako razvijenu kraljeznicu na planeti koja ima manju gravitaciju. upravo gledam sluzbenu stranicu, nigdje se ne obaraca bilo kakva pozornost na ovu fotografiju

Mi ne znamo kojim smjerom je išao eventualni razvoj života na Marsu, ili bilo kojoj planeti u svemiru.
Zašto bi njihove "kosti" trebale biti jiz istog materijala kao naše? Nije nužno, možda su olovne, ili neke mješanice olova. Na primjer.

Razvoj ne mora biti kao naš, možda je otišao u drugom smjeru, možda je "njihov" nivo viši, a možda i niži od našeg...sve treba uzeti u obzir...
Koliko sam shvatila ovo nije kostur, ovo je računalna simulacija kostura prema "odljevku", ali bez obzira na to, tko zna koliko još ima neotkrivenih elemenata u svemiru i sa kakvim svojstvima...posla još ima na pretek...

 

Ovdje smo na dnu jezera, kojega su vodom , niz okolni rub kratera, punile rijeke.
Rastapale su okolni materijal i sobom nosile i ovdje taložile.
Vidimo klastičnu sedimentnu stijenu, rekao bih aluvijalno jezerskog tipa.
Slojevitost je polljedica, recomo tome tako,  sezonskih poplava.
Ne znamo što je u ono doba gore značio pojam "sezonski"...možda nekoliko mjeseci, a možda i nekoliko godina, stoljeća...Između slojeva koje vidimo je prostor nečega, možda i ostataka mrtvih životinjica...

S pozicije od prije dva mjeseca...

sol 1126...još su tu na 1110!

Novi (djelomični) selfie..

Oct. 8, 2015


NASA's Curiosity Rover Team Confirms Ancient Lakes on Mars
A view from the "Kimberley" formation on Mars taken by NASA's Curiosity rover. The strata in the foreground dip towards the base of Mount Sharp, indicating flow of water toward a basin that existed before the larger bulk of the mountain formed.
Credits: NASA/JPL-Caltech/MSSS
Full image and caption

An image taken at the "Hidden Valley" site, en-route to Mount Sharp, by NASA's Curiosity rover. A variety of mudstone strata in the area indicate a lakebed deposit, with river- and stream-related deposits nearby.
Credits: NASA/JPL-Caltech/MSSS
Full image and caption
A new study from the team behind NASA's Mars Science Laboratory/Curiosity has confirmed that Mars was once, billions of years ago, capable of storing water in lakes over an extended period of time.
Using data from the Curiosity rover, the team has determined that, long ago, water helped deposit sediment into Gale Crater, where the rover landed more than three years ago. The sediment deposited as layers that formed the foundation for Mount Sharp, the mountain found in the middle of the crater today.
"Observations from the rover suggest that a series of long-lived streams and lakes existed at some point between about 3.8 to 3.3 billion years ago, delivering sediment that slowly built up the lower layers of Mount Sharp," said Ashwin Vasavada, Mars Science Laboratory project scientist at NASA's Jet Propulsion Laboratory in Pasadena, California, and co-author of the new Science article to be published Friday, Oct. 9.
The findings build upon previous work that suggested there were ancient lakes on Mars, and add to the unfolding story of a wet Mars, both past and present. Last month, NASA scientists confirmed current water flows on Mars.
"What we thought we knew about water on Mars is constantly being put to the test,” said Michael Meyer, lead scientist for NASA’s Mars Exploration Program at NASA Headquarters in Washington. "It’s clear that the Mars of billions of years ago more closely resembled Earth than it does today. Our challenge is to figure out how this more clement Mars was even possible, and what happened to that wetter Mars."  
Before Curiosity landed on Mars in 2012, scientists proposed that Gale Crater had filled with layers of sediments. Some hypotheses were "dry," suggesting that sediment accumulated from wind-blown dust and sand. Others focused on the possibility that sediment layers were deposited in ancient lakes.
The latest results from Curiosity indicate that these wetter scenarios were correct for the lower portions of Mount Sharp. Based on the new analysis, the filling of at least the bottom layers of the mountain occurred mostly by ancient rivers and lakes over a period of less than 500 million years.
"During the traverse of Gale, we have noticed patterns in the geology where we saw evidence of ancient fast-moving streams with coarser gravel, as well as places where streams appear to have emptied out into bodies of standing water," Vasavada said. "The prediction was that we should start seeing water-deposited, fine-grained rocks closer to Mount Sharp. Now that we've arrived, we're seeing finely laminated mudstones in abundance that look like lake deposits."
The mudstone indicates the presence of bodies of standing water in the form of lakes that remained for long periods of time, possibly repeatedly expanding and contracting during hundreds to millions of years. These lakes deposited the sediment that eventually formed the lower portion of the mountain.  
"Paradoxically, where there is a mountain today there was once a basin, and it was sometimes filled with water," said John Grotzinger, the former project scientist for Mars Science Laboratory at the California Institute of Technology in Pasadena, and lead author of the new report. "We see evidence of about 250 feet (75 meters) of sedimentary fill, and based on mapping data from NASA's Mars Reconnaissance Orbiter and images from Curiosity's camera, it appears that the water-transported sedimentary deposition could have extended at least 500 to 650 feet (150 to 200) meters above the crater floor."
Furthermore, the total thickness of sedimentary deposits in Gale Crater that indicate interaction with water could extend higher still, perhaps up to one-half mile (800 meters) above the crater floor.
Above 800 meters, Mount Sharp shows no evidence of hydrated strata, and that is the bulk of what forms Mount Sharp. Grotzinger suggests that perhaps this later segment of the crater's history may have been dominated by dry, wind-driven deposits, as was once imagined for the lower part explored by Curiosity.
A lingering question surrounds the original source of the water that carried sediment into the crater. For flowing water to have existed on the surface, Mars must have had a thicker atmosphere and warmer climate than has been theorized for the ancient era when Gale Crater experienced the intense geological activity. However, current models of this paleoclimate have, literally, come up dry.
At least some of the water may have been supplied to the lakes by snowfall and rain in the highlands of the Gale Crater rim. Some have made the argument that there was an ocean in the plains north of the crater, but that does not explain how the water managed to exist as a liquid for extended periods of time on the surface.
"We have tended to think of Mars as being simple," Grotzinger mused. "We once thought of the Earth as being simple too. But the more you look into it, questions come up because you're beginning to fathom the real complexity of what we see on Mars. This is a good time to go back to reevaluate all our assumptions. Something is missing somewhere."
More information about Mars Science Laboratory is online at:
NASA's Mars Science Laboratory Project is using Curiosity to assess ancient habitable environments and major changes in Martian environmental conditions. NASA's Jet Propulsion Laboratory, a division of Caltech, built the rover and manages the project for NASA's Science Mission Directorate in Washington.
Whitney Clavin
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-4673
whitney.clavin@jpl.nasa.gov
Based on a Caltech news release written by Rod Pyle
2015-313
Last Updated: Oct. 9, 2015

Sol 1128: Twenty Minutes to Mars

8 October 2015

I got up before dawn again today, and was treated to a beautiful view of the crescent Moon, Venus, Mars, and Jupiter in the eastern sky.  I hadn't seen Mars since it emerged from behind the Sun following solar conjunction last June (it was cloudy yesterday morning), and its dimness reminded me of how far away Mars is right now:  351 million kilometers or 218 million miles.  It takes 20 minutes for commands sent from Earth to get to MSL, at the speed of light, and another 20 minutes for data to be sent back from Mars to Earth.  We've gotten used to communicating with the rover over such great distances, but it's amazing that the link has been so reliable.

The Sol 1127 data received this morning show that the MAHLI wheel imaging and the 7-meter drive completed successfully, and initial analysis of the wheel images show no significant changes in wheel wear.  The drive placed the rover within reach of the fracture of interest, and as predicted we received just enough data to allow us to select remote sensing targets.  So the Sol 1128 plan begins with ChemCam and Mastcam observations of "Benchmark," "Greenhorn," and "Pilgrim" to see if they would be good targets for more detailed investigation.  Later in the day, Navcam will acquire a full panorama and search for dust devils and clouds.  Then MAHLI will be used to take images of Greenhorn and Pilgrim from 35 centimeters away, to help the Rover Planners determine whether they can be drilled.

by Ken Herkenhoff

Sols 1129-1131: Assessing “Greenhorn”

9 October 2015

Curiosity is currently investigating an alteration zone around a fracture.  After a successful drilling investigation at “Big Sky,” Curiosity is now ready to evaluate the alteration zone at “Greenhorn” for comparison.
The weekend plan is a busy one.  The first sol is focused on SAM activities, to prepare a cup to receive the “Big Sky” drill sample, and then to drop off the sample.  On the second sol Curiosity will use the DRT to clear off a fresh surface on "Greenhorn,” which we’ll image with MAHLI.  Overnight, we’ll acquire APXS on “Greenhorn.”  The main activity on the third sol will be CheMin analysis of the “Big Sky” sample.  Throughout the weekend Curiosity will also take standard DAN, RAD and REMS measurements. 
Meanwhile, I’ve been busy on the other side of the planet working MER operations, but I’ll be back on MSL next week so it’s good to keep an eye on all of the action! 
By Lauren Edgar

 

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