Cidersomerset
12th March 2013, 21:53
NASA confirms Mars was once a habital planet ....vid on link....
http://www.bbc.co.uk/news/science-environment-21755976
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12 March 2013 Last updated at 17:19
Mars rover Curiosity sees key water indicator
By Jonathan Amos
Science correspondent, BBC News
The rover collected about a tablespoon of powder from the drill hole Continue reading the main story
http://news.bbcimg.co.uk/media/images/66350000/jpg/_66350147_pia16729_ip.jpg
The US space agency (Nasa) has reported that its Curiosity rover has made another
significant discovery on Mars. The robot has drilled into a rock that contains clay
minerals - an indication of formation in, or substantial alteration by, neutral water.
Scientists say the find is one more step towards showing conditions on the Red Planet in
the distant past could have supported life.Many rocks studied previously were probably
deposited in acidic water. While this would not have precluded the possibility of micro-
organisms taking hold on Mars, it would have been more challenging, scientists believe.
Identifying clays shows there were at least some locations on the planet billions of years
ago where environments would have been much more favourable.
"We have found a habitable environment that is so benign and supportive of life that
probably if this water was around and you had been there, you would have been able to
drink it," said John Grotzinger, Curiosity's project scientist.The rover made the
assessment after studying a powdered sample drilled from a fine-grained mudstone at
its exploration site in Gale Crater, a deep impact bowl on Mars' equator.
http://news.bbcimg.co.uk/media/images/66197000/jpg/_66197757_66197756.jpg
Curiosity pictured at its drill site in Yellowknife Bay. The sampled mudstone lies just
in front It found the rock sample to contain 20-30% smectite - a particular group of
clay minerals. This high abundance and the lack of salt are strongly suggestive of a
fresh-water environment. The presence of calcium sulphates, rather than
magnesium or iron sulphates seen in those previous rocks, adds to the evidence
that the sampled rock formed in a neutral to mildly alkaline pH environment.
Scientists think Curiosity probably drilled into an ancient lakebed.The analysis also
identified sulphur, nitrogen, hydrogen, oxygen, phosphorus and carbon - some of
the key chemical elements for life. Additionally, it found compounds in a range of
oxidised states, meaning there were electrons moving through the environment.
Those could have been co-opted as an energy source by simple life-forms, if they
were present.The rover is building quite a catalogue of evidence for ancient water
at Gale. Already, it has revealed the remains of an ancient riverbed system, where
water once flowed perhaps a metre deep and quite vigorously.The robot is currently
working a small depression known as Yellowknife Bay, about half a kilometre from
its touchdown site last August. Nasa's original mission plan was to head towards
the big mountain that dominates the centre of Gale Crater, but the fascinating
science at Yellowknife means this journey has been delayed. Researchers on the
project intend now to remain at the present location for several weeks before
beginning the long drive to Mount Sharp. Satellite images indicate clay minerals will
also be found at the base of the mountain.
http://news.bbcimg.co.uk/media/images/66350000/jpg/_66350148_725705main_pia16726-946.jpg
Curiosity's drill can cut down through about 5cm of rock
In recent days, operations have been slowed by a software glitch, requiring the
vehicle to be run off its reserve computer.There is also the imminent issue of solar
conjunction, which will see Mars move behind the Sun as viewed from Earth,
blocking communications.All this means that Curiosity will be at Yellowknife Bay for
a while yet.
"Basically, we can't talk to the rover and the rover [can't] talk to us for most of the
month of April," said Michael Meyer, the lead scientist on Nasa's Mars exploration
programme.
"We'll do some more science activities though the end of this month, [provided] the
engineers confirm it's safe for us to do those operations. But we will not do a
second drill hole until after solar conjunction."
When the rover does finally get to the mountain, known as Mount Sharp, the
expectation, based on satellite imagery, is that it will again find clay minerals.
This will enable the robot to compare and contrast past environments
http://news.bbcimg.co.uk/media/images/56934000/gif/_56934780_mars_sl_image624.gif
http://www.bbc.co.uk/news/science-environment-21755976
The US space agency's Opportunity rover, which continues to work nine years on
from its landing, is also believed to be sitting on top of clay-bearing rocks at its
exploration site far to the west of Gale. Opportunity, however, does not have
Curiosity's capability to assess those rocks.
http://www.bbc.co.uk/news/science-environment-21755976
--------------------------------------------------------------------------------------------
12 March 2013 Last updated at 17:19
Mars rover Curiosity sees key water indicator
By Jonathan Amos
Science correspondent, BBC News
The rover collected about a tablespoon of powder from the drill hole Continue reading the main story
http://news.bbcimg.co.uk/media/images/66350000/jpg/_66350147_pia16729_ip.jpg
The US space agency (Nasa) has reported that its Curiosity rover has made another
significant discovery on Mars. The robot has drilled into a rock that contains clay
minerals - an indication of formation in, or substantial alteration by, neutral water.
Scientists say the find is one more step towards showing conditions on the Red Planet in
the distant past could have supported life.Many rocks studied previously were probably
deposited in acidic water. While this would not have precluded the possibility of micro-
organisms taking hold on Mars, it would have been more challenging, scientists believe.
Identifying clays shows there were at least some locations on the planet billions of years
ago where environments would have been much more favourable.
"We have found a habitable environment that is so benign and supportive of life that
probably if this water was around and you had been there, you would have been able to
drink it," said John Grotzinger, Curiosity's project scientist.The rover made the
assessment after studying a powdered sample drilled from a fine-grained mudstone at
its exploration site in Gale Crater, a deep impact bowl on Mars' equator.
http://news.bbcimg.co.uk/media/images/66197000/jpg/_66197757_66197756.jpg
Curiosity pictured at its drill site in Yellowknife Bay. The sampled mudstone lies just
in front It found the rock sample to contain 20-30% smectite - a particular group of
clay minerals. This high abundance and the lack of salt are strongly suggestive of a
fresh-water environment. The presence of calcium sulphates, rather than
magnesium or iron sulphates seen in those previous rocks, adds to the evidence
that the sampled rock formed in a neutral to mildly alkaline pH environment.
Scientists think Curiosity probably drilled into an ancient lakebed.The analysis also
identified sulphur, nitrogen, hydrogen, oxygen, phosphorus and carbon - some of
the key chemical elements for life. Additionally, it found compounds in a range of
oxidised states, meaning there were electrons moving through the environment.
Those could have been co-opted as an energy source by simple life-forms, if they
were present.The rover is building quite a catalogue of evidence for ancient water
at Gale. Already, it has revealed the remains of an ancient riverbed system, where
water once flowed perhaps a metre deep and quite vigorously.The robot is currently
working a small depression known as Yellowknife Bay, about half a kilometre from
its touchdown site last August. Nasa's original mission plan was to head towards
the big mountain that dominates the centre of Gale Crater, but the fascinating
science at Yellowknife means this journey has been delayed. Researchers on the
project intend now to remain at the present location for several weeks before
beginning the long drive to Mount Sharp. Satellite images indicate clay minerals will
also be found at the base of the mountain.
http://news.bbcimg.co.uk/media/images/66350000/jpg/_66350148_725705main_pia16726-946.jpg
Curiosity's drill can cut down through about 5cm of rock
In recent days, operations have been slowed by a software glitch, requiring the
vehicle to be run off its reserve computer.There is also the imminent issue of solar
conjunction, which will see Mars move behind the Sun as viewed from Earth,
blocking communications.All this means that Curiosity will be at Yellowknife Bay for
a while yet.
"Basically, we can't talk to the rover and the rover [can't] talk to us for most of the
month of April," said Michael Meyer, the lead scientist on Nasa's Mars exploration
programme.
"We'll do some more science activities though the end of this month, [provided] the
engineers confirm it's safe for us to do those operations. But we will not do a
second drill hole until after solar conjunction."
When the rover does finally get to the mountain, known as Mount Sharp, the
expectation, based on satellite imagery, is that it will again find clay minerals.
This will enable the robot to compare and contrast past environments
http://news.bbcimg.co.uk/media/images/56934000/gif/_56934780_mars_sl_image624.gif
http://www.bbc.co.uk/news/science-environment-21755976
The US space agency's Opportunity rover, which continues to work nine years on
from its landing, is also believed to be sitting on top of clay-bearing rocks at its
exploration site far to the west of Gale. Opportunity, however, does not have
Curiosity's capability to assess those rocks.