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A Hole in Mars
- yesbabyyes 14y agoIt's obviously the dwelling of a Sarlacc.
- axx 14y agoEven though this is an awesome topic, i must say, i laughed!
- indiecore 14y agoI wonder how we'd explore it. I guess land a probe with a transmitting station near it and have a rover on a wire go fall in?
- stephengillie 14y agoCould we get a flying drone down there? What does it take to make flight happen on Mars? The air is thinner, so would more force be required for airplanes and helicopters to fly? How well would hot-air or helium inflatables work, compared to Earth?
- jameyc 14y agoX-Plane had some interesting observations about the physics of flying on mars a few years back. http://www.x-plane.com/adventures/mars.html http://www.x-plane.com/adventures/mars.html
- bitwize 14y agoWow, that's gotta be one of the most pumped things I've ever read.
- iuguy 14y agoHere's a great video[1] I've just seen about flying on mars courtesy of a comment sadly further down. [1] - https://www.youtube.com/watch?v=4YQBuuhh76A&feature=player_detailpage https://www.youtube.com/watch?v=4YQBuuhh76A&feature=play...
- evaneykelen 14y agoHere's some info on using airplanes (http://mars.jpl.nasa.gov/programmissions/missions/missiontypes/airplanes/ http://mars.jpl.nasa.gov/programmissions/missions/missiontyp...) and balloons (http://mars.jpl.nasa.gov/programmissions/missions/missiontypes/balloons/ http://mars.jpl.nasa.gov/programmissions/missions/missiontyp...) on Mars. In short: it's possible.
- emiliobumachar 14y ago0.4 g's...
- iliis 14y agoYes, there is work going on to achieve that. Airplanes can fly quite well in thinner air, they just have to fly faster or have bigger wings. I don't know about helicopters or balloons, but there is a project which aims to bring a solar-powered airplane to Mars. The main problem are the batteries as they have to hold enough energy to fly trough the night. See e.g.: Noth A., Engel W., Siegwart R. Recent Progresses on the Martian Solar Airplane Project Sky-Sailor In Proceedings of the 9th ESA Workshop on Advanced Space Technologies for Robotics (ASTRA 2006), Noordwick, Netherland, 2006. [http://www.sky-sailor.ethz.ch/docs/Sky-Sailor-ASTRA2006_Noth_(13.10.2006).pdf http://www.sky-sailor.ethz.ch/docs/Sky-Sailor-ASTRA2006_Noth...] Noth, A., Bouabdallah, S., Michaud, S., Siegwart, R. and Engel, W. SKY-SAILOR Design of an autonomous solar powered martian airplane. In Proceedings of the 8th ESA Workshop on Advanced Space Technologies for Robotics, (ASTRA 2004), Noordwick, Netherland,2004. [http://www.sky-sailor.ethz.ch/docs/Sky-Sailor-ASTRA2004_Noth_(4.10.2004).pdf http://www.sky-sailor.ethz.ch/docs/Sky-Sailor-ASTRA2004_Noth...] Noth, A., Engel, W. and Siegwart, R. Flying Solo and Solar to Mars - Global Design of a Solar Autonomous Airplane for Sustainable Flight. IEEE Robotics & Automation Magazine, Volume 13, Issue 3, pp 44-52, Sept. 2006. [http://www.sky-sailor.ethz.ch/docs/Flying_Solo_and_Solar_to_Mars.pdf http://www.sky-sailor.ethz.ch/docs/Flying_Solo_and_Solar_to_...] See http://www.sky-sailor.ethz.ch/ http://www.sky-sailor.ethz.ch/ as well for more.
- tomlokhorst 14y agoThis 2009 TEDx talk is about flying an airplane on Mars: https://www.youtube.com/watch?v=4YQBuuhh76A https://www.youtube.com/watch?v=4YQBuuhh76A
- pilsetnieks 14y agoThe air is much thinner but they made a manned plane fly 85000 feet high at Mach 3.3 in the 70s. It wouldn't probably be that hard to make an unmanned drone capable of flying on Mars. To transport and ensure it's operational by the time it gets there, might be a completely different matter, though.
- ChuckMcM 14y agoIt looks remarkably like a sinkhole. Although one could joke, "Hey guys we found your Mars Climate Explorer!" Given the fact that its on the side of a volcano it could also be a hole in a lava tube. But whatever it is, it is really cool and damn wouldn't it be nice to have someone there we could ask to roll over and check it out?
- stephengillie 14y agoI agree, a 115ft (35m) wide, 65ft (20m) deep sinkhole. How far away is this from the Mars Rovers? Even having another perspective to see this would be amazing!
- vilhelm_s 14y agoI think roughly 4200km from Spirit and 6400km from Opportunity: http://toolserver.org/~geohack/geohack.php?pagename=Pavonis_Mons¶ms=0.8_N_246.6_E_globe:mars_type:mountain http://toolserver.org/~geohack/geohack.php?pagename=Pavonis_... http://toolserver.org/~geohack/geohack.php?pagename=Spirit_rover¶ms=14.5718_S_175.4785_E_globe:mars_type:landmark http://toolserver.org/~geohack/geohack.php?pagename=Spirit_r... http://toolserver.org/~geohack/geohack.php?pagename=Opportunity_rover¶ms=1.95_S_354.47_E_globe:mars_type:landmark http://toolserver.org/~geohack/geohack.php?pagename=Opportun... The rovers have driven 8km and 35km respectively, so this is out of reach. :)
- joshuahedlund 14y agoHow far is it from the projected landing site of Curiosity?
- gautier 14y agoAt 6480 km, this is even further away and clearly out of reach. http://en.wikipedia.org/wiki/Mars_Science_Laboratory#Landing_site http://en.wikipedia.org/wiki/Mars_Science_Laboratory#Landing... http://toolserver.org/~geohack/geohack.php?pagename=List_of_craters_on_Mars:_A-G¶ms=5.5_S_222.3_W_globe:mars_type:landmark&title=Gale http://toolserver.org/~geohack/geohack.php?pagename=List_of_...
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- phreeza 14y agoAre the links in the APODs always this humorous?
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- avar 14y agoI clicked the "speculation" link thinking it would be a forum thread full of scientist debating whether it was caused by volcanism or something similar, I didn't expect to be trolled by APOD.
- axx 14y agoi don't get why they do that?
- ohashi 14y agoHumor.
- mkr-hn 14y agoScientists are some of the world's greatest comedians.
- mcguire 14y agoWell, that's one way of putting it.
- ktizo 14y agoI always thought that in some parallel universe, Clifford Stoll has a pretty successful stand-up career. In this one he makes lovely klein bottles for people though, so we might have the better deal - http://www.kleinbottle.com/ http://www.kleinbottle.com/
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- smhinsey 14y agoI was really hoping for a Hollow Mars diagram when I saw that "speculation" link.
- enraged_camel 14y agoA meteorite could have crashed through a thinner portion of the surface and created the hole.
- ChuckMcM 14y agoActually, because it is circular the chance of it being a meteorite is slim. This is because the ejecta of a meteor crater is related to the angle at which the meteor hits, the more oblique the angle, the more oval the crater. A circular crater would suggest a perpendicular collision. That would suggest a very slow or very fast meteor, the latter would have caused a bigger crater. The third challenge with the meteor hypothesis is that the 'hole' suggests a cavern, and the cavern would have undergone a lot of compressive stress when struck. One would have to figure out how the meteor went through the top of the cavern without collapsing it (the shock wave from the impact would have pushed all along the top). So its not impossible that it was a meteorite but it is improbable.
- runjake 14y agoYou sound convincing, but then I look at high resolution pictures [1] of the Moon and have my doubts. I don't think those are sinkholes. That said, it does look like a sinkhole in this case. 1. http://www.nasa.gov/centers/goddard/images/content/238403main_moon.jpg http://www.nasa.gov/centers/goddard/images/content/238403mai...
- ChuckMcM 14y agoTo be clear, I wouldn't rule out a meteorite, I'm just saying that in order for it to be a meteorite some things need to be understood. The sinkhole hypothesis fits the picture precisely, but requires that someone explain how the top of the cavern got opened in the first place. In a traditional research setting the next thing we would be doing is coming up with ideas that would rule out a hypothesis in order to give us higher confidence in the ones that remain. To that end, you've added data which doesn't help us rule out either of our hypotheses so it doesn't advance us toward our goal of understanding. Finding a circular meteor crater on the moon with a cavern underneath it would be useful. Another useful thing is to look at the sides of the hole. If the material was removed by pushing outwards, the sides will have one shape, if it was removed by 'draining' into the hole in the center they will have another shape. A good experiment you could run on earth to think about that would be a put some sand over a hole and drain it, take that shape. And then to take the same setup, cover the hole lightly, and blow on it with a directed stream of air until you punch through the thin covering on the hole and then take that shape. If we can figure out the probable way in which the material was removed, that too can inform our hypothesis. I encourage you to keep coming up with ways to figure this out.
- Rotor 14y agoThis is fascinating, especially whether the hole was created from a top impact or from the bottom such as volcanic eruption. On another note, why are we discovering this just now? I was under the amateur impression that the entire surface of Mars was scanned and imaged by NASA at some point. But again, I may have interpreted that incorrectly.
- a1k0n 14y agoOne of the links goes to an earlier APOD from 2007 of other holes in Mars: http://apod.nasa.gov/apod/ap070528.html http://apod.nasa.gov/apod/ap070528.html
- Arelius 14y ago> why are we discovering this just now? I was under the amateur impression that the entire surface of Mars was scanned and imaged by NASA at some point. It's easy to forget just how large Mars is, as a comparison, if we scaled Mars up to the size of Earth, the hole would only end up being about 120 meters, or about %30 larger than an American football field. And when it's a feature that we pretty much need human eyes on to determine it's significance, it's easy to imagine how we've missed it. Just imagine trying to find a random football field sized thing in Google Earth, somewhere on the planet. And to make the comparison even more valid, Mars isn't covered in water, and has a very comparable amount of land surface area as Earth does. in that case, it makes the hole only about 36 meters when scaled up to the surface are of Earth, which is likely what you'd be searching for in Google Earth. Not to mention that I have no idea to what resolution Mars was scanned and imaged at, considering imagery I see of Earth often, the mentioned scans could easily have pixels larger then the entire size of that feature. Hence it's easy to imagine that many more interesting features of similar size exist on the martian surface, sitting there in plain view, waiting to be discovered.
- swombat 14y agoIt's pretty high-contrast, though. Presumably an algorithm could find interesting high-contrast, high-symmetry structures quite easily...
- phon 14y agoPerhaps this feature or one like it could be incorporated in to a future colony by sealing up the hole and artificially stabilizing the interior structure? I know similar ideas have been floated in the past for the conversion of lunar lava tubes into habitable space. https://en.wikipedia.org/wiki/Lunar_lava_tube https://en.wikipedia.org/wiki/Lunar_lava_tube
- tbrownaw 14y agoLooks a bit similar to https://www.google.com/search?q=bb+hole+in+glass&tbm=isch https://www.google.com/search?q=bb+hole+in+glass&tbm=isc...
- tejaswiy 14y agoI'm not usually the one to complain, but really? Not just front page, but #1 of HN?
- lifeisstillgood 14y agoFrom submission guidelines: anything that gratifies one's intellectual curiosity I just spent a whole day in AES encryption, specifications and code. Being reminded there is a wider world out there, quite literally, is fine by me, especially a world where the answers are not obvious or wrapped in politics - why is the surface white? Is it impact or collapse? Edit - just neatened up
- tejaswiy 14y agoYes, yes, I know the guidelines and I agree with you ofcourse. I'm not against discussing non CS / Startup related topics. I just felt that this particular topic isn't interesting enough for whole of HN to rank it at #1. I also realize the absurdity of complaining about a topic that doesn't match my interest in a news aggregator, but oh well.
- lifeisstillgood 14y agoI suspect you might be, like me, beginning to suffer from deja-HN I think I would like to capture the opinions of HN's best discussions, categorise them and then be able to filter on - oh look another discussion on web security best practises. Fine - does it add anything beyond what we already have filed under best-of-HN-security - no? Ok ignore. It's what I suspect kills most forums, not really going downhill, but going round and round the same hill. Instead of some of our more prolific members saying "I have posted on this before (a lot)" maybe they could say "look at the HNBrain on #dontdropyourdayrate " Cheers
- recursive 14y agoYes, it's easy to verify. Just look at the top slot of the front page.
- mirkules 14y agoIn lieu of Curiosity landing on Mars in just two weeks, I wonder if one of these is within reach for the rover to do some exploration? Although it's probably too dangerous and the rover is probably not equipped to explore something like this.
- asadotzler 14y agoThe chances of this being within single digit kms of the Opportunity rover are very very slim. Mars is a big planet. The MERs are amazing, and have outdone all expectations, but they're not magical.
- mirkules 14y agoYeah, I figured it would be slim, but I'm guilty of letting my imagination run away from me. Btw, what's an MER - Mars Exploration Rover? Agreed, if yes: I wish I was more into Astronomy when Opportunity and Spirit landed, but thankfully, they lasted long enough for me to appreciate the feat, while in progress.
- asadotzler 14y agoYep. MER is Mars Exploration Rover.
- skeletonjelly 14y agoThey also drive pretty slow from what I recall.
- xefer 14y agoWe have a pretty creepy looking one here on Earth too: https://maps.google.com/maps?ll=61.279143,-73.66333&spn=0.143038,0.308647&t=k&om=1&z=12 https://maps.google.com/maps?ll=61.279143,-73.66333&spn=...
- ojosilva 14y agoYeah, #4 on this list: http://www.touropia.com/impact-craters-on-earth/ http://www.touropia.com/impact-craters-on-earth/
- kator 14y agoFunny I visited #1 "Meteor Crater" or Barringer Crater last year with my wife.. It's hard to understand the scale of this thing until you're on the ground walking around it. Makes you feel very small in the grand scheme of things.. :)
- antoko 14y agoPretty cool, not quite the same, since we know what it is. But thanks for making me spend the rest of my afternoon wikipediaing around on random geological occurrences. http://en.wikipedia.org/wiki/Pingualuit_crater http://en.wikipedia.org/wiki/Pingualuit_crater
- huhtenberg 14y agoOh, Canada.
- internetcitizen 14y agoWhy isn't it red?
- unwind 14y agoMy guess would be that it's simply not a color image.
- macey 14y agoPretty sure Mars looks red because of the atmosphere. The surface isn't actually red. Could be wrong.
- artursapek 14y agoI think you are. https://www.youtube.com/watch?v=4YQBuuhh76A&feature=player_detailpage#t=127s https://www.youtube.com/watch?v=4YQBuuhh76A&feature=play...
- iuguy 14y agoI think you're underselling the video. That is a fascinating presentation on aerial mars exploration.
- artursapek 14y agoIt was linked to elsewhere in this thread. I'm just citing it to answer this one misconception.
- kristopolous 14y agoto the rescue: http://en.wikipedia.org/wiki/Mars_surface_color http://en.wikipedia.org/wiki/Mars_surface_color
- ComputerGuru 14y agoIf an exploration vehicle were to go there and check it out, how difficult or impossible would it be for it to leave afterwards?
- skeletonjelly 14y agoRelevant XKCD: http://www.xkcd.com/695/ http://www.xkcd.com/695/ By leave you mean, exit from inside the hole? Leave the perimeter?
- ComputerGuru 14y agoExit from within the crater.
- kkovacs 14y agoWe europeans were aware of this since our childhood. :) Where had they thought Der Maus lives? http://www.youtube.com/watch?v=-ROKq_WXFA8 http://www.youtube.com/watch?v=-ROKq_WXFA8 (Die Abendteuer der Maus auf dem Mars - The adventures of the mouse on the Mars)
- hkolek 14y agoactually the correct article for the nominative of "Maus" is "die", in the title "Die Abenteuer der Maus" "der Maus" is genitive so that's why it stands with "der" but the correct nominative is "die Maus" ("Maus" is feminine). Also note that "Abenteuer" has nothing to do with "Abend" (evening) so there's no "d" in it. SCNR.
- htf 14y ago"Holes such as this are of particular interest because their interior caves are relatively protected from the harsh surface of Mars, making them relatively good candidates to contain Martian life" Isn't that grasping at straws a little? I'm not a biologist, but it seems highly unlikely to me that life would develop in a hole 35 meters across.
- swombat 14y agoLife wouldn't develop there, but if life used to cover the surface of Mars, and largely died over time, but was still surviving in some places, this would be one of the likely spots.
- htf 14y agoI see. It still sounds like a long shot though for life to survive for a long time in such a small space.
- adventureful 14y agoThe caves and small places of Earth say otherwise. So do the intense environments on Earth that we've found life in. It's at least as plausible that life can hang on, sheltered in the smallest of places, as it can anywhere else. Micro organics often don't mind if you put them in a small place, with little sunlight, high or low heat, high or low oxygen, etc. The biggest problem would be if the changes Mars underwent were too fundamentally anti-life for anything to survive whether it was in a cave or anywhere else. In my opinion, we're going to find out on Mars that there are forms of microbes that can hang on in sedentary 'ready' state for a billion years, in extreme environments, just waiting to jump back to activity. Most of Mars will be barren, but there will be small pockets of microbes (most likely in a sheltered cave, under ice, or similar) in a form of extreme suspended animation.
- jt2190 14y agoThey're not saying that life developed there, they're saying that if there ever were martian life, this is one of the few places on the planet that has a (relatively) less-severe environment, and therefore a higher likelihood of finding surviving specimens.
- marknutter 14y agoSounds like the opening to a pretty cool scifi movie.
- nrbafna 14y ago10 lines of CSS makes this site slightly more pleasant to the eyes :-) http://i.minus.com/i0i1hE5frYO4T.png http://i.minus.com/i0i1hE5frYO4T.png
- CamperBob2 14y ago(Shrug) The image got smaller and the text got blurrier, but maybe my eyes aren't the best optimization targets.
- wlesieutre 14y agoYour browser probably shrunk the image he linked so that it fit. Try clicking for full size.
- nrbafna 14y agoclick on the image once, then it zooms in to the actual size.
- Ralith 14y agoSend it to them!
- natep 14y agoWhat 10 lines?
- scommab 14y agoFrom the look of the screenshot it looks like the poster just applied the standard twitter bootstrap css style sheet to the page. If you wanna see what it looks like for yourself (and are using chrome) you can use this chrome plugin I wrote: http://scommab.github.com/chrome-twitter-bootstrapper/ http://scommab.github.com/chrome-twitter-bootstrapper/
- nrbafna 14y agoJust the link color was borrowed from Twitter Bootstrap. Rest is pretty much white background, max-width, padding between <center> elements on the page, bigger line-height :)
- adv0r 14y agoI don't really understand how come no-one was able to see it before... I don't know how it works, but since telescopes are looking for stars and stuff much more distant that mars, I was confident that they scanned the whole surface of neighbors planets decades ago... Some explanation?
- MiguelHudnandez 14y agoThings that could cause it to be missed: * Angle of photography * Time of day (direction of sunlight) * Weather conditions We often ignore problems that are "closer" to us. For example, the oceans on our own planet are still very much a mystery, yet we still look outward.
- mistawobin 14y agoWhat specifically about our oceans are a mystery?
- R_Edward 14y agoI'm just going to leave this right here. http://www.xkcd.com/1040/ http://www.xkcd.com/1040/ It's a little bit of awesome.
- swang 14y agoMars (according to Wikipedia) has a surface area of 144,798,500km^2. This thing is within an area of 35 meters^2 and I'm guessing it's not very flashy when viewed on a screen. Needle in a haystack.
- aroberge 14y agoThere's a limit for how big/small an object you can see with a telescope due to diffraction. For instance, the Hubble telescope can not distinguish features on the moon that are less than approximately 100 meters. Obviously it gets much worse for Mars and the other planets.
- huhtenberg 14y ago
- mmaunder 14y agoWormsign?
- AsylumWarden 14y agoVacant Sarlacc pit?
- ostarr 14y agoHas anyone ever spent any time over at: http://marsanomalyresearch.com/ http://marsanomalyresearch.com/ ? Thoughts?
- rapind 14y agoI think it's pretty obvious what this is. http://imgur.com/Ei4r0 http://imgur.com/Ei4r0
- jnw2 14y agoIf we had one of the surplus Hubble-diameter Naval Reconnaissance Office mirrors orbiting Mars with a suitable camera, would we have better pictures than this? And could one of those mirrors be mounted in the trunk of a SpaceX Dragon spacecraft?
- D_Alex 14y agoCould we put a glass roof over that and fill the interior with a breathable atmosphere?
- vladocar 14y agoStrange few days ago I made this free Android App that takes info from APOD and NASA https://play.google.com/store/apps/details?id=nasa.project.vladocar https://play.google.com/store/apps/details?id=nasa.project.v... and today we have unusual picture of Mars on HN.