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#176 Re: Unmanned probes » Spirit & Opportunity *3* - ...continued from previous threads » 2004-02-01 06:14:13

Stu

Thanks Stuart. I'm just so glad I found the New Mars web site. You wouldn't believe how many space related forums there are on the net that don't have anybody talking about Spirit and Opportunity.

Hey, just "Stu" ok? Only my mum calls me "Stuart"  :;):

Seriously tho, welcome aboard the good ship New Mars. In my opinion this is simply the best place to be to share in this incredible adventure.

As for the insides of Opportunity's crater, I get the feeling the JPL guys aren't really that bothered about mapping it too thoroughly. They want to get to that outcrop, study it, then strike-out for the crater rim and roll over onto the great unknown beyond. Me too!  smile

Yesterday's event was very educational for me, it made me realise just how interested the so-called "man in the street" is in these Mars missions. Lots of excellent questions, and interest in all aspects of the missions. (Only had one guy humph and say "just a bunch of rocks...") Have to say tho, the biggest hit of the day - and thrill for me - was showing kids (and some of their parents) the 3D images returned by the rovers, projected onto a big screen. The looks on the kids' faces as they looked at the pics thru their 3D glasses - and, in some cases, reached out to try and grab the rocks - was amazing... big_smile

Sad to not have any Beagle 2 pics tho. We were hoping for something of a celebration yesterday...

#177 Re: Unmanned probes » Spirit & Opportunity *3* - ...continued from previous threads » 2004-02-01 04:48:05

Stu

Hi all,

Good to be back!

Missed the live egress yesterday, and most developments the past two days as I've been busy organising a day-long "Mars Fest" event here in the north of England. Spirit and Opportunity pics projected onto big screens, live internet surfing, Mars software demonstrations, Mars meteorites, eight different lectures, kids activities... it was an excellent day, and over 200 people came along to share in the "Mars Mania" during the day, despite lashing rain and gale force winds... so, disappointed I missed the hematite announcement, and the egress, and a whole new batch of pics, but I'm going to have fun catching up  smile

Really enjoyed reading everyone's posts from the last couple of days - welcome onboard 1smlstp, love your enthusiasm, you're definitely in the right place  smile

#178 Re: Unmanned probes » Spirit & Opportunity *3* - ...continued from previous threads » 2004-01-28 23:53:10

Stu

Wow, that's *excellent* news!! Sending me off to work with - for a change - a smile on my face  smile

Very good image resource site here, by the way...

[http://www.lyle.org/mars/]http://www.lyle.org/mars/

Especially good for 3D pics...

#179 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-26 23:55:50

Stu

Just been looking at the latest hi-res image of Opportunity's crater landing site... some fascinating detail near the horizon don't you think Josh? I was *so* wrong about the exposed rock being a wall, it's more like exposed sub-surface slabs, almost like limestone pavement in fact. Reminds me of the rock structures seen on the surface of Venus by the Russian Venera landers actually... Great too to be able to see though a notch in the crater wall to the world beyond...  smile

The "pancakes" are fascinating too, and I really like the brine-saturated ideas being floated here. Liked the recent "hard ice cream" analogy too... maybe the dark spots are choc chips...  :;):

By the way, anyone wanting to read a very well-informed and thought-out web blog by a successful Mars writer, Oliver Morton ("Mapping Mars") should check out his website:

[http://mainlymartian.blogs.com/semijournal/]http://mainlymartian.blogs.com/semijournal/

#180 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-25 08:30:35

Stu

Been looking closely at a hi-res image of the first colour pic...

[http://marsrovers.jpl.nasa.gov/gallery/ … d_part.jpg]http://marsrovers.jpl.nasa.gov/gallery....art.jpg

... and I'm just a little concerned about something... I'm wondering if this crater Opportunity has landed in is a dust sink of some kind. Why? Well...

a) Right at the top of the image there, on the right, there's a very obvious pink-tinted rock outcrop which appears to be emerging from quite deep, dark material...

b) Running from the right to the left, across the top third of the image, is what appears to be an apron of dark, fine material, with very pronounced ripples in it. They look very much to me like slump features, as if the material has somehow spilled down from the top right, in a fan across our field of view... have to be quite deep to do that, right?

c) the "Magic Carpets" 'pancakes' near the base of the image are VERY flat, suggesting the airbags compressed quite thick deposits rather than shalloow ones. You can see on the pancake on the far right that the only feature on it is a very pronounced slashed groove, which is probably a seam from an airbag. Elsewhere, i.e. nearer the lower left, the "Magic Carpet" material shows very deep markings, but is still quite flat on top.

Add all this upm (I know, adding 2 and 2 to get 5... I'm just speculating!) and looking at that image I can't help wondering if what we're seeing is a windblown dustfield inside a crater of some kind.

And is it me, Josh, or does the brighter, pink-black material look more like cinders than dust?

#181 Re: Unmanned probes » Which Mars site has you more interested? - Gusev Crater or Meridiani Planum » 2004-01-25 07:05:46

Stu

When I saw the first pics of Gusev, the rock-hound in me was slack-jawed at the sight of what appeared to be an exposed bedrock layer on the far side of Sleepy Hollow, and the variety of rocks strewn across the landscape had me very excited. I thought it was a wonderland...

But now, looking at Meridiani, that layer across near the horizon there is just soooo fascinating, and I'm imagining what it would be like to be there now, and set-off across the crater floor towards it, my boots scuffing up puffs of dust and fines the colour of dried strawberries or powdered blood as I bunny-hopped my way away from Opportunity. Then reaching The Wall (I'm going to call it that from now on, I think  smile ) and running my gloved hands over the exposed, weathered blocks, kneeling down in front of it, knees pressing down into the dust, looking at the colours, textures and forms, maybe even glimpsing tiny curled-up fossils embedded in the stone...

And then there's the far horizon, too... imagining turning my back on The Wall and slogging my way up the slope, feeling the dust hissing away beneath my feet like sand on a dune, then reaching the top and seeing a sweeping, David Lean-esque vista of rippled sand-dunes the colour of red wine, scattered with jagged outcrops of hematite, shining and glistening in the sunlight...

So, sorry Gusev, you're great, but I want to be with Opportunity. The Wall is calling.  smile

#182 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-25 06:04:34

Stu

Stu, I really recommend getting XnView... it'll let you view practically any image file, and it's free. You can get it here: [http://www.xnview.com/]http://www.xnview.com/

XnView is really great for panning these huge .tif files. You can pan about with ease, zoom in, do zone edits so if you want to change the hue on a certain area, you just select it, etc.

In any case, the high res .jpg should be available here in awhile: [http://photojournal.jpl.nasa.gov/jpeg/PIA05144.jpg]http://photojournal.jpl.nasa.gov/jpeg/PIA05144.jpg

Good advice, as usual, thanks! I'm actually writing this on my laptop, away from home, so I'll wait until I get back to base to do that.

Looking forward to seeing the jpeg tho... that rock "wall" over there near the horizon is fascinating isn't it? Can't decide if it looks more like sedimentary layers or shattered bedrock, like a breccia layer or something. I do think it's stronmg evidence for Opp being in a crater tho, we've lots of pics of lunar craters which show similar "terracing". Wow... sudden thought... sedimentary bedrock... micro-fossils...

Wouldn't that be a thing?  smile

#183 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-25 05:41:43

Stu

Aaagh, .tiff again... I have no luck with those. Guess I'll have to wait for a fat juicy jpeg to appear  smile

#184 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-25 05:33:15

Stu

Stu, I dunno, but I do know with reasonable certainty that we simply don't know what the processes are yet. Remember, when Spirit took some close ups of the soil, and attempted to press down on it, there was no change! None at all! ]

Yeah, but remember that "pressing down" was being done by a teeny metallic finger, a very gentle prodding... I can't help thinking that a whopping-big gas-bloated hot airbag smashing into the ground at several km/h and then rolling across it, bleeding heat and gases, would have more effect  smile

Gonna check out that image now, thanks for sending it...

#185 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-25 05:17:57

Stu

Listen, this "Magic Carpet" material... they put it down to possibly being unique to the surface material at Gusev, but it's there at Medidiani too, so I think we need to consider the possibility that the Magic Carpet material is being *caused* by the landing process itself. How about this...

The lander hits the surface at a fair speed, right? And when the air bags hit the surface, hard, the gas inside them will heat up as it is compressed, right? Soooo... how about this for a process. The airbags must get hot on the outside as they compress, as heat from the internal gas reaches the outer skins... surely it's a possibility that there will be enough heat to cause some heating of the surface material beneath the bags, maybe enough to warm water trapped in the dirt and soil sufficiently enough to cause some muddification... and when the airbags deflate, the gas - warm gas, remember - has to go somewhere right? Surely that hot gas playing over the surface will warm the dirt, maybe enough to melt any ice particles trapped within it and cause the surface material to folow, or at least muddify, briefly? I mean, come on! What more do they need? Air bag seams pressed into it... rocks pressed into it, bow waves around the rocks... what are they looking for, a hippo wallowing around in it?!  :;):

I was prepared to believe that the Gusev Magic Carpet was an anomoly, but I;m not now. We're seeing it here too. I'm putting my neck out and saying that we must be seeing some kind of mud, caused by heat/friction/something from the impact of the airbags.

Anyone?

#186 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-25 05:04:37

Stu

I'm honsetly stunned by how quickly these images are appearing on the net...

Just take a moment to think about the wonder of this, how far we've come... I mean, we send a probe to Mars, with its own brain, watch it land virtually live, and now we're sitting here, in our homes, a community of friends scattered all around the world, watching pictures from the surface of ANOTHER PLANET without any real delay, any censorship, any interference of any kind. We're *there* guys, we're THERE, on Mars, we're **involved** with this, we're a PART of it, all of us here on this board. Steve S, Rob M, all those guys on that panel are sharing everything with us every day, unselfishly, genuinely and sincerely; every up, every down, every high and low, every success and problem and failure. They let us see them happy and smiling, and they let us see them tired, and deflated, and wracked with worry and despair and confusion...

And in a couple of weeks Opportunity is going to roll off its lander and explore a landscape which looks like something from a dream. Near that horizon I am sure I can see layers of shattered bedrock, blocks of impact-shattered material... the ground beneath Opportunity's "feet" looks like once-melted and now-set treacle, I defy *anyone* to tell me that they're now not considering the possibility that it might be a mud of some sort.

And if we are in a crater, what vistas will greet us when we drive up the sloping crater wall and look over the top... will we see a vast plain, scattered with jagged outcrops of hematite? More craters? We can't have any idea...

And doesn't it just make you shiver?  smile

Hesitate to use the term "Golden Age" but withing a month there will be a New Mars for everyone.

Look at those pictures...!!!!

big_smile

#187 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-25 04:38:34

Stu

Just managed to get online and see the pics... missed all the fun of landing #2 this morning, and have been out of the loop for a day or so, ironically because I'm busy organising a huge "MARS DAY" science exhibition/Outreach event next  Saturday here in Cumbria. Good to be back - I missed you guys!!!... and great to hear that Spirit is looking healthier

But these first pictures...

Oh... My... God...

Have you ever seen such an amazing place? It looks bizarre, beautiful, enticing, beckoning... we are going to have SUCH fun exploring this place, all of us here, thru Opportunity's eyes.

And the look of almost rapture on Steve's face, how his heart must be flying right now, after fearing they'd lost Spirit. I am so happy for him!  big_smile

So what do you all make of the images so far? I think they are in a shallow crater, the horizon looks very sharply-defined and close too. And I'm sorry, but they really are going to have to stop pussy-footing aropund and admit that that could be mud around the lander, especially when you can see the imprint of one of the airbag *seams* in it!!

Going to do some serious surfing now, catch up on things...

#188 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-21 23:49:24

Stu

Steve: I also think it's got a lot to do with the atmospheric conditions and pressure - there is simply more air at the chosen landing sites because they are effectively depressions, beneath the "surface level" of Mars if you like, so parachutes have more air to "grab at" and slow the landers down here than they would at the elevated poles.

Also, weather conditions at sites such as Gusev and Meridiani are more stable (no thermals rising or dust swirling about as the ice evaporates or sublimes). Add to that the fact that they have no uncharted crevasses, and features of interest (rocks) are exposed right there on the surface, so there's no need to snuffle about under circuit-chilling dry ice snow to find rocks to sniff with a Mossbauer, and you can see why they were chosen...

...but you can bet that there are geologists at JPL just aching to get to the poles and start digging about in those gateau-like sedimentary layers... smile

S

#189 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-20 11:12:02

Stu

Just wanted to let you guys know that tomorrows (todays/Tuesdays) press briefing will occur at 9:30 AM PST. Or 17:30 GMT if I did my math right. Just wanted to let you guys know just in case I wasn't here... not that it matters and all, we probably won't see much anything exciting...

smile

Thanks for letting us know Josh. I do wonder how the tone of the briefings will change once the "gee whizz" stuff is out of the way and serious field geology takes over...

Was away over the weekend, good to see Spirit didn't drive into a crater or get eaten by a sandworm while I was unable to get online... smile

#190 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-17 04:00:30

Stu

For news, status, updates, scientific info, images, video, and more, check out:

[http://axonchisel.net/etc/space/mars-ex … ights.html](AXCH) 2004 Mars Exploration Rovers - News, Status, Technical Info, History

That is an absolutely *superb* site, thanks for sharing it with us.

I'm never going to get ANY work done now.. big_smile

#191 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-16 11:57:36

Stu

Those of you who are calling the play-by-play on Spirit (you know who you are...hehe)...

(shocked look) surely you don't mean me..?  :;):

Latest I heard was that the plan is to start Spirit moving late Saturday or early Sunday, after the spectrometers have taken some measurements. I'm not sure if it'll be heading right for the crater tho; I'd expect some limited exploration of the immediate vicinity, to get some baseline readings of rock types and surface material composition etc, before heading for more exotic - and, let'sface it, more dangerous - locations... just my guess tho.

Patience young Jedi, patience...  smile

#192 Re: Unmanned probes » Mars Express (MEX) - ESA orbiter » 2004-01-15 13:41:48

Stu

First release of pictures due from Mars on Jan 20th...

[http://www.newscientist.com/news/news.jsp?id=ns99994573]http://www.newscientist.com/news/news.jsp?id=ns99994573

Quote from one of the team: "They blew me away..."

Article states that among the first targets of the MEx's 2m resolution camera will be Valles Marineris and Olympus Mons..

Can't wait!!!  big_smile

#193 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-15 11:31:28

Stu

You relate that it's hoped Spirit will travel approximately 6 times further than it was designed to.

It's a BIG hope... but my fingers are crossed, and I don't know, Spirit just feels destined for great things, don't you think? I must admit, when I heard the names I thought they were poor choices, less than inspiring, but "Spirit" seems quite a plucky machine so far, so the name might be appropriate after all.  smile

#194 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-15 11:09:43

Stu

*What is the approximate maximum distance traveling range for rovers like Spirit (and Opportunity)?  I'm not sure I've encountered that information, though I likely forgot (information overload....steam is going to start rolling out of my ears any moment now...)

If I remember rightly, Steve Squyres said in the briefing that the Eastern Hills are 3km away, which is approx six times further away than the rover was designed to drive.

Wow...!

#195 Re: Not So Free Chat » Bush's New Space Policy - Discussion, reactions, questions... » 2004-01-14 15:05:06

Stu

It's *so* encouraging that President Bush thinks Spirit is on Mars "looking for life", don't you think?

Getting a severe case of deja vu here... a pre-election President Bush stands up in front of flags and an audience of old astronauts and politicians, beams for the cameras, semi-quotes Kennedy, promises the Universe, sets up a Commission to look at the cost, sees the bill and then quietly forgets all about it.

Tell you what, let's all just calm down now and enjoy Spirit's egress, and look forward to Opportunity landing safely too, cos this "plan" puts us no nearer to going to Mars than we were yesterday or a year ago, and Spirit is just hours away from rolling onto Gusev's red dirt. I know which I'm more excited about.

#196 Re: Not So Free Chat » Bush's New Space Policy - Discussion, reactions, questions... » 2004-01-14 14:46:04

Stu

Unless I missed it in the crackling, he didn't actually give a date for a manned Mars mission... but human flights to the Moon beginning 2020? You can put Mars another ten years ahead of that.

sad

#198 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-14 13:39:37

Stu

Jinx Stu!! big_smile

What did I "jinx"? I don't understand...

S

#199 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-14 11:47:20

Stu

Conference: Everything looking good for Spirit's historic drive-off the lander and onto Mars... wheels-down should be around 12.45 PST, and there will be a live commentary of that available on NASA TV, and a Press Briefing is scheduled for 2am PST with details of how things went.

Good luck guys!

S

#200 Re: Unmanned probes » Spirit & Opportunity 2 - Continued from original thread » 2004-01-13 23:28:49

Stu

man that panorama is the coolest thing ever.  what is the really big hill off in the distance around to the right of the 'east hill comlex'?  is it the south mesa, or south/southwest hill?  if only there was some feedback in the pic about which direction you're looking in... like a little digital comass or something.

Jade,

One of the images released yesterday

[http://marsrovers.jpl.nasa.gov/gallery/ … R1_br2.jpg]http://marsrovers.jpl.nasa.gov/gallery....br2.jpg

labels *all* the mountains and features visible on the horizon, every hill and mesa, with azimuth directions, which you can use to approximate compass bearings. For example, the "South Mesas" are indicated as lying at 178.7 deg, which is just short of south (180deg). I am sure that images to come will have other keys too.

Fascinating to wander around that panorama, isn't it?  smile

S

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