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#921721 - 07/12/17 11:11 AM Re: Red Planet Reports [Re: Mona - Astronomy]  
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Mona, I wonder if making changes like that on the surface cause climate change or other changes?

#921737 - 07/13/17 03:30 AM Re: Red Planet Reports [Re: Mona - Astronomy]  
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Mars is not likely to be much disturbed by the rovers.

As of yesterday, Curiosity had driven 18,786 meters since arriving on Mars in August 2012. That's less than 19 km (about five and half miles). So any effects would be limited to a pretty small area over nearly five years.

In addition, the rover's tire marks are very shallow. Think of an earthly equivalent and it could only affect perhaps plants or animals or vulnerable surfaces - but again over a very small area.


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#921748 - 07/13/17 04:38 PM Re: Red Planet Reports [Re: Mona - Astronomy]  
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This is not a picture of Mars looking like Earth. It's more of a picture of Earth that might make you think of Mars. It's the Danakil Depression, one of the hottest and most hostile places on earth. It exists where three tectonic plates come together in northeastern Ethiopia - an other-worldly and sunken plain. The heat quivers here. Rock formations are colored by minerals in oozing volcanic psychedelia. Not much can survive in Danakil. The average year-round temperature is 34.4 degrees Celsius and the area gets about 100 mm of rain per annum.

The extreme environment makes it a good place to see what things are like in such hostile conditions. (I wouldn't want to be one of those doing fieldwork there!)

[credit: Chris Giles, for CNN]


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#922026 - 07/27/17 06:14 AM Re: Red Planet Reports [Re: Mona - Astronomy]  
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Young volcanoes in the Coprates Chasma region of Mars’s enormous Valles Marineris canyon system have been imaged by NASA’s Mars Reconnaissance Orbiter. When geologists talk about young, they mean mere millions of years old - in this case 200-400 millions of years old. Since most of the Martian volcanic activity took place a few billion years ago, I guess millions is young.

Image Credit: NASA/JPL/University of Arizona

Now here's something quite cool. A stereo view of the valleys of Coprates Chasma. It was created using stereo image data from a camera on board the European Space Agency’s (ESO) Mars Express spacecraft.

Credit: ESA/DLR/FU Berlin, CC-BY-SA 3.0 IGO


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#923991 - 10/26/17 10:01 AM Re: Red Planet Reports [Re: Mona - Astronomy]  
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Feast your eyes on this panorama made from images Curiosity's mast cam took. It shows the last rays of the Sun on the hills of Mt Sharp. (The colors were adjusted for a more natural look.)

Credit image: NASA/JPL-Caltech. Image processing: Thomas Appéré


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#924664 - 11/25/17 08:20 PM Re: Red Planet Reports [Re: Mona - Astronomy]  
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Everybody takes selfies - even the Mars Curiosity rover that took its own selfie in mid-2015. It wasn't just one snap, but another of smaller images that were combined to make one detailed image. It was taken in front of the light-colored peak of Mt Sharp, dark layered rocks and rusting red sand. (There's even a small rock stuck in one of Curiosity's wheels.)

Image Credit: NASA, JPL-Caltech, MSSS


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#926095 - 01/27/18 09:37 PM Re: Red Planet Reports [Re: Mona - Astronomy]  
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The rover Curiosity, which has been on Mars since August 2012, took a selfie at the south rim of Vera Rubin Ridge on January 23 this year. It isn't, of course, one selfie, but a mosaic of a number of images taken by the Mars Hand Lens Imager. (Frames containing the imager's arm were edited out.) The background panorama was taken the previous month by the Rover's Mastcam. Distant Mount Sharp is obscured by the ChemCam at the top of the mast housing.

Image Credit: NASA, JPL-Caltech, MSSS - Panorama: Andrew Bodrov
Commentary adapted from: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)


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#926393 - 02/15/18 08:22 PM Re: Red Planet Reports [Re: Mona - Astronomy]  
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Have you seen this reference to Mars? That's an interesting way of looking at it. There have been times when the Venus would have qualified - but only briefly, because nothing lasts for long on Venus.


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#926432 - 02/18/18 10:24 PM Re: Red Planet Reports [Re: Mona - Astronomy]  
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On January 25, 2004 (UTC time) the Opportunity rover landed on Mars to carry out a mission that was expected to last for about three months. More precisely, the aim was for 90 sols, a sol being one Martian day. A day on Mars is about forty longer than an Earth day. NASA didn't think that it's solar-powered rover would survive a Martian winter. But it did, and followed it up by surviving several more. The rover is still hard at work, currently investigating the processes that shaped the Perserverance Valley outcrop.


Mona Evans
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#927002 - 03/27/18 03:23 PM Re: Red Planet Reports [Re: Mona - Astronomy]  
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Amusing story from space.com by Jeanna Bryner, LiveScience Managing Editor | March 22, 2018

Astronomer Peter Dunsby just made a groundbreaking discovery, after noticing a very bright "star" pop up in his field of view at an observatory at the University of Cape Town that was not present two weeks prior.

Too bad Dunsby was perhaps thousands of years late … the bright object was the planet Mars.

Before realizing his marvelous mistake, Dunsby posted a note on the Astronomer's Telegram, a publication for very short reports by astronomers, detailing his observations, in which he described the bright object had shown up between the Lagoon and Trifid nebulas, both nestled in the constellation Sagittarius.

About 40 minutres later, the Telegram issued a correction: "The object reported in ATel 11448 has been identified as Mars. Our sincere apologies for the earlier report and the inconvenience caused."

And, not to let Dunsby go quietly into the night, the Telegram also sent out a cheeky tweet: "For Discovery of Mars. Congratulations, Prof. Peter Dunsby!"


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