Tag Archives: Mars

Water was flowing on Mars 200,000 years ago – scientists

The crater formed long after the most recent proposed ice age on Mars, which ended some 400,000 years ago (PA/Nasa Hubble Space Telescope)

The crater formed long after the most recent proposed ice age on Mars, which ended some 400,000 years ago (PA/Nasa Hubble Space Telescope)

New research has suggested that water was flowing across the surface of Mars some 200,000 years ago. The nature of rock formations in a Mars crater suggests the sediment deposits and channels it contained were formed by ‘recent’ flowing water.

Swedish scientists from the Department of Earth Sciences at the University of Gothenburg identified “Very young …and well-preserved deposits of water bearing debris flows in a mid-latitude crater on Mars,” according to the study published in the journal Icarus.

It was previously estimated that liquid water flowed across the Red Planet during its last ‘ice-age’, some 400,000 years ago. However, the young age of the crater means the features signifying water must have appeared since.

The scientists drew comparisons between the geomorphological land formations and the Norwegian archipelago of Svalbard. The crater had features of areas on earth where debris flow had caused material to be deposited by fast-flowing water.

“Our fieldwork on Svalbard confirmed our interpretation of the Martian deposits,” stated Andreas Johnsson, a spokesperson for the research team.

“Our study crater on Mars is far too young to have been influenced by the conditions that were prevalent then. This suggests that the meltwater-related processes that formed these deposits have been exceptionally effective also in more recent times,” said Johnsson.

“If we find on Mars evidence for a second genesis, that changes everything,” Johnsson added.

A debris flow takes place when liquid water soaks through debris lying on an incline to the point that it becomes saturated and heavy, causing it to descend down the incline.

On earth, debris flow can result in material destruction and sometimes casualties, depending upon their severity.

When the flow stops, new landforms are made, including lobate deposits and paired levees. It is these that Johnsson has identified on the planet.

“Gullies are common on Mars, but the ones which have been studied previously are older, and the sediments where they have formed are associated with the most recent ice age. Our study crater on Mars is far too young to have been influenced by the conditions that were prevalent then,” Johnson said.

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NASA’s Curiosity takes first-ever photo of Earth from Mars

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The Mars rover Curiosity has gone sentimental with a picture of its home planet, Earth, seen for the first time as a dot from the Red Planet’s surface.

After 529 (Martian) days spent in exploration of Mars’s soil and chemical composition, the robot took the opportune moment 80 minutes after sunset on January 31 to photograph the third rock from the sun, which at the time was located at a distance of about 160 million km (99 million miles) from Mars.

Zoomed-in pictures courtesy of NASA’s Jet Propulsion Laboratory show Earth’s moon as well.

Curiosity is the much-lauded effort by the American space agency’s Mars Science Laboratory Project to land a science vessel on the Martian surface for the purpose of studying its chemical composition, changing climate and if water – and life – has previously existed on the planet.

It has had a few mishaps along the way, including an ‘alien’ scare, but all systems are functioning normally, as the 1-ton robot plows on.

Curiosity landed on Mars in the August of 2012 and in that time has covered about 5km. Several milestones have been reached, with the ultimate one still to come. The ascent of Mount Sharp – a huge mountain located several kilometers to the southwest of the rover’s current location – is the next big goal.

NASA’s Curiosity takes first-ever photo of Earth from Mars — RT News.