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Moon

Odysseus Moon Lander 'Tipped Over On Touchdown' (bbc.com) 87

On Thursday, the Odysseus Moon lander made history by becoming the first ever privately built and operated robot to complete a soft lunar touchdown. While the lander is "alive and well," the CEO of Houston-based Intuitive Machines, which built and flew the lander, said it tipped over during its final descent, coming up to rest propped up sideways on a rock. The BBC reports: Its owner, Texan firm Intuitive Machines, says Odysseus has plenty of power and is communicating with Earth. Controllers are trying to retrieve pictures from the robot. Steve Altemus, the CEO and co-founder of IM, said it wasn't totally clear what happened but the data suggested the robot caught a foot on the surface and then fell because it still had some lateral motion at the moment of landing. All the scientific instruments that planned to take observations on the Moon are on the side of Odysseus that should still allow them to do some work. The only payload likely on the "wrong side" of the lander, pointing down at the lunar surface, is an art project.

"We're hopeful to get pictures and really do an assessment of the structure and assessment of all the external equipment," Mr Altemus told reporters. "So far, we have quite a bit of operational capability even though we're tipped over. And so that's really exciting for us, and we are continuing the surface operations mission as a result of it." The robot had been directed to a cratered terrain near the Moon's south pole, and the IM team believes it got very close to the targeted site - perhaps within a couple of kilometers. A US space agency satellite called the Lunar Reconnaissance Orbiter will search for Odysseus in the coming days.

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Odysseus Moon Lander 'Tipped Over On Touchdown'

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  • Solution (Score:4, Funny)

    by backslashdot ( 95548 ) on Saturday February 24, 2024 @02:06AM (#64264856)

    Maybe they should land on the moon's North Pole instead of south of it.

    • They should've learned from the Martian lander.

      It was a tetrahedron, so there was no "wrong" side.

      Martian Lander - Structure [nasa.gov]

      • They should've learned from the Martian lander.

        It was a tetrahedron, so there was no "wrong" side.

        Martian Lander - Structure [nasa.gov]

        Before I make a snarky remark as to why they didn't do that, I am presuming the reason is the Martian Lander had the benefit of parachutes and giant retrorockets to slow it down enough that it didn't plow into the martian surface.

        Whereas, in the current case, there is no atmosphere to deploy parachutes into so they only had rockets to slow the descent and it was easier to make a craft taller rather than wider. The complete opposite of a good burger [memedroid.com].

        • As a neoliberal scientist, why have you left out the crucial cost-benefit analysis, gentle sir? What if it's just cheaper to buy tip-over insurance than actually not make it tip over?

    • Maybe they should land on the moon's North Pole instead of south of it.

      Maybe you should do a little more research.
      Something something ... water ... something.

  • Looking at a photos of the IM-1 inside the fairing it seems the pads were quite small, and sharp edged. Perhaps the notion of having 6 legs led to a false sense of security in tipping, but if the pad's small has little of a raised edge it could well dig in with a bit of horizontal drift.
    But of course it's so easy to argue about this now. They did very very well and I would not be surprised if their next one in a few months had redesigned pads.
    • Re:Landing pads (Score:4, Interesting)

      by Brett Buck ( 811747 ) on Saturday February 24, 2024 @02:45AM (#64264894)

      It's also very "tippy", and very prone to lateral movement. Compare it to Surveyor, the pads on Surveyor were essentially cylindrical, but the CG was about a foot and a half and it had a very broad landing gear span. Same with the Japanese lander that also tipped over.

    • Don’t forget 1/6th earths gravity. It makes tipping over much easier for the same speeds.
    • So much for market innovation, eh?

      • I have no inside information about IM, but NASA/Hughes (the contractor for Surveyor) were definitely hedging their bets and giving themselves all the margin they could to maximize the chances of success. The Soviets (Luna) too the added step of having an uprighting mechanism of sorts.

        BTW, without any specific details here, when you didnt have a lot of computer capability, you were inclined to give lots of margin. Now, the tendency is to try to solve problems with massivel

        • Why am I reminded of the toothpaste dispenser assembly line that would randomly produce empty boxes, so the engineers designed a complex weighing apparatus, whiie the workers just put a fan to blow the empty boxes off the line?

  • by 93 Escort Wagon ( 326346 ) on Saturday February 24, 2024 @02:53AM (#64264914)

    Are we sure there aren't some little green men running around up there, engaging in that well-known lunar prank of "satellite tipping"?

  • by SeaFox ( 739806 )

    Imagine being that artist... "Yeah, my work is up there on the moon, but no one will ever see it since it's under the lander."

    • Never say never. If lunar tourism becomes a thing someone may be able to go over there and un-tip it.

      • Right after the âoewe are sailors to the moonâ exhibition.

        • by thomst ( 1640045 )

          guruevi blathered:

          Right after the "we are sailors to the moon" exhibition.

          It's "whalers," idiot. Not "sailors." "Whalers."

          The tip-off is the next line: "We carry a harpoon."

          Y'know, if you lift your arms just the tiniest bit, your knuckles won't get all red and swollen like that ...

  • After years of totally uninspiring art lessons, someone has got their revenge... ;)

  • Still no images, and I wonder why that is when it appears the lander is communicating?

    Very low bandwidth due to the tipping, possibly?

    Or camera facing straight up now?
    • Re: Why no images? (Score:5, Informative)

      by rfunches ( 800928 ) on Saturday February 24, 2024 @06:37AM (#64265092) Homepage
      The CTO said in the press conference that the lander's comms system post-landing is designed to look for a good lock with Earth, and if not, switch arrays. I think he said the window is 15 minutes to establish and verify a full carrier lock. Because of the limits of the ground stations and their procedures to instruct the lander to move past that sequence, they weren't able to get it all completed in 15 minutes, so the lander would switch arrays (there are two with two antennas each) and the whole process restarts. He did say in the presser that the team expected it to be solved soon and get the lander out of its comms loop. But that suggests they're currently getting less than 15 minutes of data at a time, and the time to recycle means they're probably not getting a full four windows per hour. He also said they use data error detection/correction on the transmits so while they expect to get all of the data, there's clearly overhead for integrity that eats into the max data payload.
  • by Growlley ( 6732614 ) on Saturday February 24, 2024 @07:50AM (#64265190)
    can't park by stick.
  • Let’s see now, that’s Odysseus or IM (from tfa) and SLIM both losing functions from being tipped over. Seems like instead of betting everything will go off flawlessly they could use a self righting feature to ensure operation instead. A simple arm could self right in the low gravity but also run experiments for example. Even with a low center of gravity and some give on the passive landing gear it’s not so simple in 1/6th gravity because it’s so easy to bounce and the surface is f
    • Aren't the scientists literally supposed to be thinking about next quarter's shareholder report at all times? Would Uncle Miltie have it any other way, my highly-esteemed capitalist shill friends?

    • Seems like instead of betting everything will go off flawlessly they could use a self righting feature to ensure operation instead.

      For example, they could make the bottom of the instrument a weighted hemisphere, so that if it lands on its side, gravity will pull it back up until it wobbles into place. If you or your children have ever played with Weebles toys [fandom.com], you might understand how this works.

      • That’s a strategy, but it only works on flat surfaces. If it was stuck in powdery moon dust with rocks it likely won’t hurt but may not right. I believe any competent engineer would already have a low center of gravity in the upright position as mentioned, for the same stability reason.
      • by hawk ( 1151 )

        but that could take more mass--unless you find a way to put mass that already needs to make it to landing down there. Batteries?

    • Should be designed to land on it's side and then self right itself
  • I remember reading about development of one of the mars landers, and out at the design test site they had one individual who would put rocks in the worst possible test locations. It started arguments and made craft designers mad. In the end they had a more robust design because of it.

    • Mars provides one important advantage to rockets, compared to the moon. It has an atmosphere, which enables rockets to land using parachutes. These do provide a significant advantage.

  • Why are the links in TFS just re-linking back to Slashdot instead of, y'know, actual articles?

    • by Ksevio ( 865461 )

      Looks like the "editors" just used the same link to the old story twice instead of to the BBC article.

  • by skogs ( 628589 )

    Can we please give some of these engineers a copy of KSP? Honestly this IS NOT rocket science. Apollo lander had a pretty goddamn wide base. The Japanese lander a couple weeks ago and now this lander - both very narrow bases. FFS....pretend the ground is not concrete and that you are not perfectly accurate horizontally. Go outside and throw a cardboard box and see if it lands upright on the smallest surface it has.

    Literally every bastard that plays KSP learns this the first time they land.

    These guys ha

    • Wait a minute ... isn't this actually literal rocket science?!?

      • by skogs ( 628589 )

        No it is not you twat.

        Materials science, navigation, thruster control, electronics, expansion, fuel conditioning, thermals, etc....that is all included in rocket science.

        These guys are fucking up the equivilent of a knocking over a tall glass. Balance is conquered by 18 month old babies - and one doesn't start out walking like their a gymnast on a tightrope ... they start with their feet a little further apart.

    • MOD UP. If you think it's a troll, you're part of the problem.

    • Both the Japanese and this lander were upright and top-heavy. I speculate that one of the reasons for this form factor is an attempt to fit within the fairings of cheaper, smaller launchers. Although it seems that they could have designed for the same form factor designed to land horizontally with wide-splayed legs.

      I also note that these guys were happy getting within a kilometer of its target. The Japanese one got it within a hundred meters.

  • This is a momentous achievement and the IM team should be justifiably proud, I suspect the sensor failures may have played a role in them not sticking the landing.

    But having said all of that - I suspect they would have valued getting the landing perfect over any of the onboard scientific instruments collecting data about water on the moon (even though that may be of most value to the ongoing program) , because the landing was most of what the AI was intended to accomplish I believe.

  • it's not like it's rocket science,

As you will see, I told them, in no uncertain terms, to see Figure one. -- Dave "First Strike" Pare

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