astronomy

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Deebster, w Japan’s moon landing picture might be the space photo of the decade
@Deebster@beehaw.org avatar

TIL that Takara Tomy (the company that made the Transformers toys) designed the Transformable Lunar Robot LEV-2, aka Sora-Q (“sky sphere”):

https://beehaw.org/pictrs/image/289d7326-fc21-47da-b3be-7c2006b559da.webp

nooneescapesthelaw, w NASA finally figures out how to open a $1-billion canister

Why didn’t they just use a socket wrench?

This is why you don’t send an scientest to do an engineer’s job

LesserAbe, w Frozen water discovered on Mars could fill Red Sea

I’m glad there’s water. We need that!

Bears_Koolaid, (edited ) w NASA Finally Removes Last Two Fasteners To Access Historic Bennu Asteroid Sample

I really want to see the tool they developed to do this.

Edit: This NASA blog page has some images and more details of the tools themselves

…nasa.gov/…/nasas-osiris-rex-team-clears-hurdle-t…

XeroxCool,

Are those… Philips screws? Looks like maybe two dots indicating JIS (shallower angle, less cam-out, and #1 cause of stripped screws on Japanese motorcycles) but I’d really like to know why a hex or torx screw wasn’t used

Bears_Koolaid,

I was curious about that too. They look like Torq-set to me, being that the slots are offset from the center of the screw. If that’s the case they’re shouldn’t be any cam out at all.

In either case the fasteners that were stuck appear to be Hex head, and the phillips looking fasteners just held a protective cover in place (?)

I would imagine NASA would know better than to use Philips for anything lol.

By the way there is a link on the page to more images of the assembly

Cuttlersan, w The First US Moon Lander Since The Apollo Era Is About to Make History

Exciting! :D

doug, w For the first time, astronomers watch a black hole 'wake up' in real-time
@doug@lemmy.today avatar

Oh my goodness. That is the cutest black hole in here. And he’s comin’ this way, oooooooooooooooooh!

arakhis_, w Hubble peers deep into Uranus, finds extra time
@arakhis_@feddit.org avatar

That’s what’s gonna happen when you peer deep into uranus

quediuspayu, w Toxic Mars Dust Could Pose Major Health Risks For Future Astronauts

Hasn’t been a known fact for years that martian dirt is toxic as fuck?

threelonmusketeers, w Crew arrives at International Space Station to replace astronauts stranded for 9 months

to replace astronauts stranded for 9 months

They were never considered stranded, except maybe for the few days between Starliner’s empty return and the Crew-9 Dragon’s arrival. Certainly not for 9 months.

This also isn’t really relevant to astronomy.

conditional_soup, w Asteroid 2024 YR4 now has a 1.94% chance to hit the Moon (according to my own calculations)

This is super cool! I was kinda hoping it would hit soonish. 2032 feels like it might as well be 3032 with how things are going. Hopefully this doesn’t mess up any of the world’s plans for lunar bases.

egrets, w Confirmed at Last: Barnard's Star Hosts Four Tiny Planets
@egrets@lemmy.world avatar

Unfortunately we’ll never get to visit them in person if Prostetnic Vogon Jeltz has anything to say about it:

We are about to jump into hyperspace for the journey to Barnard’s Star. On arrival we will stay in dock for a seventy-two-hour refit, and no one’s to leave the ship during that time. I repeat, all planet leave is canceled. I’ve just had an unhappy love affair, so I don’t see why anybody else should have a good time.

anindefinitearticle, (edited ) w Kissing moons may explain why Earth's moon is so large

deleted_by_author

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  • toast,

    *rogue

    Zachariah, w Asteroid Ryugu samples suggest presence of salty water in outer solar system
    @Zachariah@lemmy.world avatar

    tears?

    bahbah23,

    Damn it, my head went straight to pee and yours is so much better, I got to get off the internet

    technohacker, w Eliminating singularities: Physicists describe the creation of black holes through pure gravity
    @technohacker@programming.dev avatar

    Gonna hijack this post to ask a somewhat related but possibly stupid question, would it be possible that instead of a singularity there happened to be a region of space with non-negligible size (ie, not a point sized region) that acted like a well instead? Things could “fall” into that well and not be able to escape, but it’s not like everything in the well is at a single point.

    e0qdk,
    @e0qdk@reddthat.com avatar

    I may be misunderstanding your question, but black holes are regions of space that have non-negligible size; the boundary between what can escape and what can’t is called the event horizon. The singularity is what happens at the center.

    technohacker,
    @technohacker@programming.dev avatar

    Ah right I worded that wrong, sorry!

    I guess what I mean to say is, would a non-negligible sized “singularity” (I know I’m messing with that term quite a bit, I’ll stray from the mathematical definition) be consistent with our current theories?

    BaroqueInMind,

    No one can get information from beyond the event horizon, so no one can truly know besides predict with math.

    Tarquinn2049, (edited )

    Basically, what makes sense logically isn’t backed up by what data and math we have. Logically, we would assume as enough stuff is pulled together that the density hits a point where gravity is stronger than the bonds that hold matter together, that those bonds would break and the individual elements, initially atoms, but as gravity gets stronger and stronger the bonds between the components of atoms and so on and so forth also break down.

    At some point, there is a limit to how much matter can break back down into further and further smaller components. What specifically happens when that limit is reached? That is a huge part of what could be throwing the math off. We don’t really know, but we have some guesses. Could be at the end, one of the components is weightless, and unaffected by the gravity, we do see some energy radiating out of some black holes in a straight line or “jet”. Hard to say for sure. Logic doesn’t always get us there when we don’t have enough data and need to make a leap. It might eventually, as we can slowly tie more and more stuff together with more data. Could be whatever energy starts that jet either immediately or already on the way out, mixes/mixed with other components and particles to become what we end up detecting it as. But if we could see it earlier, it maybe would be completely different before that.

    gnutrino,

    Depends what you mean by “our current theories”. In classical General Relatively the answer is pretty conclusively no but many people think that a quantum theory of gravity should be able to remove the singularities. In fact, this article is about an attempt to do just that with a fairly natural extension to GR (albeit one that is only mathematically tractable in 5 or more dimensions) and seems to have succeeded for the static spherically symmetric case at least.

    lemming,

    Nobody really thinks singularities exist. It’s only what comes out from our math. That’s also how we know our math is wrong, we’re just not sure yet how to do it better.

    FreakinSteve, w Don’t panic, but an asteroid has a 1.9% chance of hitting Earth in 2032

    Can we speed that up a bit?

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