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 Post subject: Re: Mars Thread?
PostPosted: Wed Dec 14, 2016 5:20 pm 
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Ancient Mars Could Have Harbored Life for a Long, Long Time

https://www.scientificamerican.com/arti ... long-time/

Hopefully some still lurk deep underground and we're not too late to make their acquaintance.

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 Post subject: Re: Mars Thread?
PostPosted: Thu Dec 15, 2016 9:00 pm 
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ExoMars Trace Gas Orbiter takes in a rarely-imaged view of Phobos

http://www.planetary.org/blogs/emily-la ... hobos.html

Mmm, potato.

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 Post subject: Re: Mars Thread?
PostPosted: Sun Dec 18, 2016 9:29 am 
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How Strong is the Surface Gravity on Mars?

http://www.universetoday.com/14859/gravity-on-mars/

There's a bit more than 285 m/s here.

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 Post subject: Re: Mars Thread?
PostPosted: Tue Dec 20, 2016 4:54 pm 
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Small Troughs Growing on Mars May Become 'Spiders'

http://www.jpl.nasa.gov/news/news.php?feature=6707

Quote:
"We have seen for the first time these smaller features that survive and extend from year to year, and this is how the larger spiders get started," said Ganna Portyankina of the University of Colorado, Boulder. "These are in sand-dune areas, so we don't know whether they will keep getting bigger or will disappear under moving sand."


Animated gif provided by NASA to illustrate their findings.

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 Post subject: Re: Mars Thread?
PostPosted: Thu Dec 29, 2016 6:14 pm 
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Color Variations on Mount Sharp, Mars

https://www.nasa.gov/image-feature/colo ... sharp-mars

Quote:
The orange-looking rocks just above the purplish foreground ones are in the upper portion of the Murray formation, which is the basal section of Mount Sharp, extending up to a ridge-forming layer called the Hematite Unit. Beyond that is the Clay Unit, which is relatively flat and hard to see from this viewpoint. The next rounded hills are the Sulfate Unit, Curiosity's highest planned destination. The most distant slopes in the scene are higher levels of Mount Sharp, beyond where Curiosity will drive.

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 Post subject: Re: Mars Thread?
PostPosted: Mon Jan 02, 2017 9:19 pm 
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The Argument Against Terraforming Mars

http://cosmos.nautil.us/short/85/the-ar ... rming-mars

Shades of the areophany mentioned in Kim Stanley Robinson's Mars Trilogy?

What's ASTRA's take on terraforming Mars if it is possible. Let's completely forget the hard science behind it and use our imaginations and some wish fulfillment here.

Would you terraform Mars from its current state?

I wouldn't, I'd rather be genetically modified to live on the Martian surface without protection.

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 Post subject: Re: Mars Thread?
PostPosted: Mon Jan 02, 2017 9:29 pm 
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Image

Caught in Action: Avalanches on North Polar Scarps

https://hirise.lpl.arizona.edu/PSP_007338_2640

Higher resolution of embedded image: https://i.imgur.com/qAyILGa.jpg

Quote:
By comparing images taken before the fall and after the fall, we may be able to see where material has disappeared from the steep scarp and where it has appeared on the gentler slopes below, possibly as larger blocks, diffuse streaks, or other debris deposits. By imaging this scarp throughout the polar summer, we may be able to determine how much material falls over a given time period. These observations will help determine how much, and at what rate, ice is being eroded from the cliff. Understanding the processes and rates of erosion also help determine how the polar landscape has evolved, and help reveal how volatiles, such as water and carbon dioxide ices and gases, move around Mars.

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 Post subject: Re: Mars Thread?
PostPosted: Thu Jan 05, 2017 5:26 pm 
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A chunk of interplanetary debris recently slammed into Mars and left this fresh crater and spray of ejecta

http://blogs.discovermagazine.com/image ... r-on-mars/

Quote:
The image above, acquired by the orbiter’s High Resolution Imaging Science Experiment is a compelling example. It shows a crater and blast zone from an impact that likely occurred as recently as this past August, and no later than January 2014, according to HiRISE scientists.

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 Post subject: Re: Mars Thread?
PostPosted: Wed Jan 18, 2017 7:54 am 
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Curiosity finds Mars rock that may be a meteorite made from iron

https://www.newscientist.com/article/21 ... from-iron/

It's exactly what it says on the tin. With photo!

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 Post subject: Re: Mars Thread?
PostPosted: Wed Jan 18, 2017 2:13 pm 
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NASA's Curiosity finds new water evidence in possible cracked mud

https://www.engadget.com/2017/01/17/nas ... racked-mu/

Headline's straightforward and there is a photo for consideration.

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 Post subject: Re: Mars Thread?
PostPosted: Mon Feb 06, 2017 9:59 pm 
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Curiosity Rover Sharpens Paradox of Ancient Mars

http://www.astrowatch.net/2017/02/curio ... ox-of.html

Quote:
"We've been particularly struck with the absence of carbonate minerals in sedimentary rock the rover has examined," said Thomas Bristow of NASA's Ames Research Center, Moffett Field, California. "It would be really hard to get liquid water even if there were a hundred times more carbon dioxide in the atmosphere than what the mineral evidence in the rock tells us." Bristow is the principal investigator for the Chemistry and Mineralogy (CheMin) instrument on Curiosity and lead author of the study being published this week in the Proceedings of the National Academy of Science.

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 Post subject: Re: Mars Thread?
PostPosted: Tue Feb 07, 2017 9:49 pm 
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An ancient Martian volcano that's nothing like anything on Earth erupted non-stop for 2 billion years

http://www.businessinsider.com/martian- ... rth-2017-2

Quote:
"What this means is that for 2 billion years there's been sort of a steady plume of magma in one location on the surface of Mars," Caffee said. "We don't have anything like that on Earth, where something is that stable for 2 billion years at a specific location."

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 Post subject: Re: Mars Thread?
PostPosted: Mon Feb 13, 2017 7:32 pm 
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Jezero crater most popular scientific target on Mars for NASA’s 2020 rover

http://www.sciencemag.org/news/2017/02/ ... 2020-rover

Quote:
The clear top candidate was Jezero crater. It was followed by Northeast Syrtis, a nearby carbonate-rich site home to ancient, water-associated clays that could be tied to potential hydrothermal springs. Both spots sit close to old volcanic rocks, another important goal for a mission that will collect samples that may ultimately be returned to Earth. Eberswalde crater, home to another clay-rich delta, came in third, followed by Mawrth Vallis, another potential hot spring site.

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 Post subject: Re: Mars Thread?
PostPosted: Fri Feb 17, 2017 11:01 am 
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Researchers Pinpoint Watery Past on Mars

http://www.astrowatch.net/2017/02/resea ... -mars.html

Quote:
“These findings are hugely significant. Firstly, the Martian sand dunes show evidence that water may have been active near Mars’ equator -- potentially in the not-too-distant past. And secondly, this location is now a potential geological target for detecting past life forms on the Red Planet, which is important to those involved in selecting sites for future missions.”

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 Post subject: Re: Mars Thread?
PostPosted: Sun Feb 19, 2017 10:03 am 
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Mars might already be building rings from its moons

https://www.newscientist.com/article/21 ... its-moons/

Quote:
In a few million years, Mars’s moon Phobos will be shredded into pieces that will settle into a flat ring like Saturn’s. But bits of Mars’s two moons may already be circling the Red Planet, some of it in the form of nascent rings.

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 Post subject: Re: Mars Thread?
PostPosted: Sat Feb 25, 2017 10:42 am 
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More Earth-Like Than Moon-Like

http://www.astrowatch.net/2017/02/more- ... -like.html

Quote:
“Long-lived volcanic systems with changing magma compositions are common on Earth, but an emerging story on Mars,” said James Wray, study co-author and associate professor in the School of Earth and Atmospheric Sciences at Georgia Tech. Wray led a 2013 study that showed evidence for magma evolution at a different martian volcano, Syrtis Major, in the form of unusual minerals. But such minerals could be originating at the surface of Mars, and are visible only on rare dust-free volcanoes. “At Elysium we are truly seeing the bulk chemistry change over time, using a technique that could potentially unlock the magmatic history of many more regions across Mars.”

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 Post subject: Re: Mars Thread?
PostPosted: Sun Feb 26, 2017 7:23 pm 
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Life on Mars: Preparing for the Red Planet

https://www.nytimes.com/video/science/1 ... lanet.html

This is a 360° interactive video. Interactive meaning you can pan around while stuff's going on.

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 Post subject: Re: Mars Thread?
PostPosted: Tue Feb 28, 2017 8:07 am 
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Sand Moving Under Curiosity, One Day to Next

http://photojournal.jpl.nasa.gov/catalog/PIA21143

Quote:
The pair of images in this animation shows effects of one Martian day of wind blowing sand underneath NASA's Curiosity Mars rover on a non-driving day for the rover. Each image was taken just after sundown by the rover's downward-looking Mars Descent Imager (MARDI). The area of ground shown in the images spans about 3 feet (about 1 meter) left-to-right.

The first image was taken on Jan. 23, 2017, during the 1,587th Martian day, or sol, of Curiosity's work on Mars. Figure 1 above is the image with a scale bar in centimeters. The second was taken on Jan. 24, 2017 (Sol 1588). The day-apart images by MARDI were taken as a part of investigation of wind's effects during Martian summer, the windiest time of year in Gale Crater.

When Curiosity landed inside Gale Crater in August 2012, MARDI recorded the descent from the rover's point of view. Malin Space Science Systems, San Diego, built and operates MARDI.

NASA's Jet Propulsion Laboratory, a division of the Caltech in Pasadena, California, manages the Mars Science Laboratory Project for the NASA Science Mission Directorate, Washington, and built the project's Curiosity rover.


Nothing lasts forever. Curiosity's tracks will vanish one day.

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 Post subject: Re: Mars Thread?
PostPosted: Tue Feb 28, 2017 5:30 pm 
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Mars May Erupt Again

https://cosmosmagazine.com/space/mars-may-erupt-again

Quote:
Research suggests that a Martian volcano twice as high as Everest was spewing lava much more recently than previously thought – and may do so again

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 Post subject: Re: Mars Thread?
PostPosted: Thu Mar 02, 2017 11:01 am 
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In Photos: Opportunity Rover's Amazing Finds in Mars' Meridiani Planum Region

http://www.seeker.com/in-photos-opportu ... 40610.html

Lotsa purty pitchers

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 Post subject: Re: Mars Thread?
PostPosted: Sun Mar 12, 2017 9:28 am 
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Mars Reconnaissance Orbiter Tracks Back-to-Back Regional Storms

http://www.astrowatch.net/2017/03/mars- ... -back.html

Quote:
"What's unusual is we're seeing a second one so soon after the first one," said Mars meteorologist Bruce Cantor of Malin Space Science Systems, San Diego, which built and operates MARCI. "We've had orbiters watching weather patterns on Mars continuously for nearly two decades now, and many patterns are getting predictable, but just when we think we have Mars figured out, it throws us another surprise."

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 Post subject: Re: Mars Thread?
PostPosted: Sun Mar 19, 2017 11:01 am 
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A Closer Look at Holden Crater

https://www.nasa.gov/image-feature/jpl/ ... den-crater

Quote:
The layered deposits of Mars' Holden Crater were caused by water flowing through a breach in the crater rim.

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 Post subject: Re: Mars Thread?
PostPosted: Mon Mar 20, 2017 8:48 pm 
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Mars volcano, Earth's dinosaurs went extinct about the same time

https://www.eurekalert.org/pub_releases ... 032017.php

Quote:
"We estimate that the peak activity for the volcanic field at the summit of Arsia Mons probably occurred approximately 150 million years ago--the late Jurassic period on Earth--and then died out around the same time as Earth's dinosaurs," said Jacob Richardson, a postdoctoral researcher at NASA's Goddard Space Flight Center in Greenbelt, Maryland. "It's possible, though, that the last volcanic vent or two might have been active in the past 50 million years, which is very recent in geological terms."


COINCIDENCE??? j/k (kinda)

And... more on Mars's rings.

A Moon of Mars May Have Once Been Rings (& Might Be Again)

http://www.space.com/36132-mars-moon-ph ... cycle.html

Quote:
A new model suggests that Mars' oddball moon Phobos might once have been rings around the planet, caused by a large impact about 4.3 billion years ago, and that as it approaches the planet it will be torn into a ring again.


What would be really cool is if Mars's rings, or its moons, were created by volcanic activity 'round Tharsis.

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 Post subject: Re: Mars Thread?
PostPosted: Wed Mar 22, 2017 9:46 am 
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A flight over Mars

https://vimeo.com/207076450

Quote:
The anaglyph images of Mars taken by the HiRISE camera holds information about the topography of Mars surface. There are hundreds of high-resolution images of this type. This gives the opportunity to create different studies in 3D. In this film I have chosen some locations and processed the images into panning video clips. There is a feeling that you are flying above Mars looking down watching interesting locations on the planet. And there are really great places on Mars! I would love to see images taken by a landscape photographer on Mars, especially from the polar regions. But I'm afraid I won't see that kind of images during my lifetime.

It has really been time-consuming making these panning clips. In my 3D-process I have manually hand-picked reference points on the anaglyph image pairs. For this film I have chosen more than 33.000 reference points! It took me 3 months of calendar time working with the project every now and then.

The colors in this film are false because the anaglyph images are based on grayscale images. I have therefore color graded the clips. But I have tried to be moderate doing this. The light regions in the clips are yellowish and the dark regions bluish. The clips from the polar regions (the last clips in the film) have a white-blue tone.There are a lot of opinions and studies of what the natural colors on Mars might be. But the dark regions of dust often seems to have a bluish tone. Please study this issue on e.g sites by NASA.

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 Post subject: Re: Mars Thread?
PostPosted: Thu Mar 23, 2017 7:52 pm 
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Mars rover spots clouds shaped by gravity waves

http://www.sciencemag.org/news/2017/03/ ... vity-waves

Image

Quote:
Using Curiosity’s navigation camera, Moores and Kloos recorded eight-frame movies of this wispy cloud belt for two martian years. They’ve used two angles to capture the clouds: one pointed directly up, to see wind direction and speed, and another that keeps the rover’s horizon in the frame, allowing a view into the clouds’ depth. The captured clouds are so thin as to be invisible without painstaking computer enhancement, Kloos said in his presentation Tuesday.

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