Space Time is hiring new script researchers and new writers! Check out the latest community tab post for details and how to apply!

@tramasrarasoddplots

8 ай бұрын

I would love to work Space Time. However, I don't have the background, experience, or talent to do so🙃. If you ever need a farm laborer...😅

8 ай бұрын

Hire a sound guy.

@osmosisjones4912

8 ай бұрын

In retrospect retrospect itself violates entropy

@osmosisjones4912

8 ай бұрын

Wouldn't it be easier to put telescope on the moon then put Earth's atmosphere on the moon like in the Phineas and Ferb episode

@drstone3418

8 ай бұрын

Looks like that crop circle response to the Voyager

I don’t think it’s said enough that you are one of the best presenters and educators on KZread, Matt. Stellar work (pun intended)!

@DonalKavanagh1963

8 ай бұрын

Absolutely agree.

@MrAries67401

8 ай бұрын

Completely agree

@silviavalentine3812

8 ай бұрын

I agree with 5 sigma of certainty!

@martinwulf8253

7 ай бұрын

The only one who compares is David Kipping from Cool Worlds.

@GRDwashere

7 ай бұрын

@@silviavalentine3812 I'll see your 5 sigmas and raise you one... 6 sigmas of certainty.

Life is like a box of photons, you never know how warped it's gonna get.

@SlCKNESS_

8 ай бұрын

Ngl I might steal that one.

@imacmill

7 ай бұрын

Life gets warped? I've not heard that one before.

@nucle4rpenguins534

4 ай бұрын

One can 'effectively' hope at least :)

I’m thrilled for this, not only because bigger telescopes are better, but also because it’ll kickstart lunar development.

@TehJumpingJawa

8 ай бұрын

Build a lunar telescope as far from noisy primates as possible.... Kickstart lunar development by invading noisy primates. The classic victim of its own success.

@michaelconnaireoates5344

8 ай бұрын

If only some space agency did kickstarters

@zachjones6944

8 ай бұрын

@@TehJumpingJawa No. Machines will inherit the moon.

@FriedrichHerschel

8 ай бұрын

Yes. For this project, NASA/ESA would need a relay satellite in lunar orbit (or L2 as mentioned), but due to the telescope not being able to work when the sun shines on it, that relay satellite might face 50% of its time without work. NASA/ESA might therefore consider a something else to make use of that relay satellite.

@AlOlexy

8 ай бұрын

Hands off the moon. Science only please.

We need this if only so the next Bond movie can have a fight scene in a Lunar crater. That's what radio telescopes are for, right?

@nickmhc

8 ай бұрын

90’s kids understand this reference

@umeng2002

8 ай бұрын

"For Elon, James..."

@TheDemigans

8 ай бұрын

*drops Sean Bean from the bottom, he sloooowly falls down*

@Grunttamer

8 ай бұрын

@@TheDemigansbecause the fall wouldn’t be fatal, it could be the one role where his character lives

@numericalcode

6 ай бұрын

Moonraker + Goldeneye = Science

I think it's a great idea. Something multiple space agencies should collaborate on.

@jordanfarr3157

8 ай бұрын

This. Loudly absent was any talk of other groups trying this.

@jacksonstarky8288

8 ай бұрын

I was thinking the same thing... right away my brain went "what about a NASA-ESA collaboration?" because this is a gap in our understanding that really needs investigation.

@KuK137

8 ай бұрын

Don't worry, USA will waste hundreds of billions sending arms to nazis and terrorists before spending a single cent on this. Science? Pfft, arms companies pay a lot to get their puppets elected, maybe if these dumb nerds cough up a few billions in bribes-- I mean PAC funds the congress will think about funding progress, too...

@Mike-oz4cv

8 ай бұрын

Collaboration is inefficient. Better let each agency focus on individual, big projects.

@JohnnyWednesday

8 ай бұрын

America won't work with Russia or China because America want to be the most powerful country in the world - like a complete arsehole would.

11:53 This animation is FANTASTIC. The expansion of the central disc area like the unfolding of an origami flower is just... chef's kiss.

@andytroo

8 ай бұрын

origami maths for the win :)

@250txc

8 ай бұрын

Stupid

@KuK137

8 ай бұрын

And then all that needs to happen is a single hook not catching anything for the proposers of this plan to look very silly and dumb, and you can't even send humans to fix it because no one will scale 200 meter tall cliff in space suit...

@andytroo

8 ай бұрын

@WeavingBird eg smithsonianmag theres-origami-revolution-industrial-design-180972019 (web links don't work in TY comments)

@andytroo

8 ай бұрын

@@KuK137 I'm sure this well known failure mechanism will be taken into account in the design.

I don't know what would be discovered, but I believe that it should be no surprise to anyone that there will be surprises.

@ucheopara6309

8 ай бұрын

Surely, there will be surprises on the Darkside of our moon.

@user-ge8yn4ql4i

7 ай бұрын

​@@ucheopara6309especially when the far side and dark side coincide :)

So cool to get an episode on this from both real engineering and space time!

@tuneboyz5634

7 ай бұрын

thats right lil buddy 😊

@efhi

7 ай бұрын

@@tuneboyz5634 you alright?

@tuneboyz5634

7 ай бұрын

@@efhi yeah I'm good 😊 How are you? 🙂

I'd love to see this happen. Building sky telescope on extraterrestrial sites around the solar system.

When I was an undergrad I enjoyed this channel as entertainment, and now as a PhD candidate I think hmm should I devote the next five years of my life studying this

@joshingai4842

7 ай бұрын

what have you learnt?

Imagine if the science budget for the world was large enough that humanity could do something like this just 'because'.

@SolidSiren

7 ай бұрын

We should never be putting things on the moon "just because". Space should be treated as or better than we treat national parks and rainforests. Carefully. Very carefully.

@kurage_medusa

6 ай бұрын

@SolidSiren there are no ecosystems to destroy on the moon though, so why not?

@ptonpc

6 ай бұрын

@@SolidSiren To be blunt. The only things alive on the moon are when humans do things. Industries and science programs can be put there with no ill effects on Earth. Unless you don't know the difference?

Firing all those harpoons in just the right way sounds like it has no chance of not going wrong. But then I said the same thing about that sky crane thing, so shows what I know.

Matt carries an emergency pastry so he doesn't have to talk to fans.

Wouldn’t the telescope be vulnerable to asteroids from impact and the moon dust? How often do we expect a direct hit or a near miss?

@seriousmaran9414

8 ай бұрын

The telescope will be very thin but strong thread, dust will mostly go through the holes. Larger pieces might punch through but won't make enough difference to degrade performance. A radio telescope does not have the same issues that an optical one does where impacts will damage the lens and diffract light.

@Merennulli

8 ай бұрын

Roughly 1 in 12 billion chance per day. Assuming the timescale for this project is 25 years, it has a 1 in 1.3 million chance of getting hit by anything large enough to do meaningful damage. EDIT: Sorry, you asked how often. About once every 25 million years.

@Mp57navy

8 ай бұрын

@@Merennulli Sounds safer than driving to work or going to the toilet.

@Merennulli

8 ай бұрын

@@Mp57navy I don't want to say whether or not it's safer. I was just giving the chance of meaningful impact (which is lower for anything on Earth due to the atmosphere). But there are no other telescopes driving around to run into it, and the telescope won't take codeine before using the restroom. But it has a lot more risks in getting there. And once it gets there, the intense solar radiation isn't doing it any favors for longevity. I also didn't answer the dust portion of the question because I don't actually know the answer on that. We have technology to deal with the electrostatically charged dust by using it to generate power and using that power to negate the charge. But I don't know if that technology is beyond the prototype phase yet. That said, they won't launch it if they don't have some dust management technology in place.

@TheTuttle99

8 ай бұрын

​@Merennulli lmao who are you?

Surely the greatest discovery from this project will be the Monolith we discover in the side wall of the crater.

@Nefville

8 ай бұрын

Just make sure you mute your TV when we do.

I'm over the moon with excitement for this! 🌕 Not only do bigger telescopes rock 🌌, but they'll also be a catalyst for kickstarting lunar development! 🚀💫

Sounds like Radio Shack is back in business, baby!

RIP Arecibo. Still not over it.

If we ever had a plausible excuse for a "moonbase" or a moon colony, then building & operating this telescope just might be it!

Great episode! Audio volume is kind of low, though.

@dangerfly

8 ай бұрын

Yes, very low.

@pavelborisov515

8 ай бұрын

Over compressed audio

11:00 it's the other way round: it has to be heavier at the center. And to support the mesh better it is a good idea to have additional ropes between the main support strings (spider-web like) - this can also do the job to create the parabolic shape, because they would lessen the tension of the main ropes in the center.

I’m beginning to think that Isaac Arthur was onto something when he said, and I’m paraphrasing: ”Give NASA the budget to build a lunar colony, and you’ll end up with a lunar telescope instead.” This is why we need a space development agency, lol.

Wooo new spacetime! Thanks Matt ❤

Thank you Matt and PBS Spacetime!

Always love a new episode!

I'm always so happy whenever I see a new PBS Space Time video in my feed.

All these years and this continues to be GREAT!

When Matt explains the redshifting of the CMB for the 100th but you remember that the first rule of teaching something is repetition 🧑‍🔬

Also, your graphics team absolutely nailed it this episode

I prefer wide array of dipole antenna to parabolic mesh dish. Dipole antenna can be steerable like AESA radar to observe whole sky. And it can be deployed gradually over long time. First with few antenna, next 10's of antenna and finally 100's of antenna on moon's surface. The antenna can be scattered over very wide area like few km-10 km per antenna and used as long base line interferometry telescope array, which will improve spatial resolution greatly.

@TheTuttle99

8 ай бұрын

Sounds like an exponentially more costly project

Language time! The “e” in “Chang’e” is a schwa in the International Phonetic Alphabet; that is, the same vowel as in “uh” or “um” in most English accents. “Chang-uh”. Bonus round! The “ch” in many Chinese words, including the name of the moon goddess, Chang’e, represents a very interesting consonant cluster. In the IPA, English “ch” is usually represented as two consonants articulated in succession, “t” and “ʃ”, typically represented as “sh” in English. In Chinese, there is an additional variant of “tʃ” which includes a retroflex fricative consonant, rendered as “ʂ” in IPA; in practice, this is a little like curling your tongue into the English “r” shape while pronouncing “tʃ”. This one probably requires a bit more practice for speakers of the various English dialects, and easier to sort of swallow outside of a Mandarin Chinese speaking environment compared to the “uh” vowel, which is both used in English and quite prominent in the word-final position. (This is all for pronunciations in Mandarin Chinese, by the by, no idea how things shake out in Cantonese or any other of the various languages/dialects under the “Chinese” umbrella.)

IMAGINE an alien civilization beaming radio signals at us for contact but never knowing about the ionosphere...

@JesusFriedChrist

8 ай бұрын

If we have one, so do they. They know about it.

@TheSuperRatt

8 ай бұрын

I think rather than not knowing about the ionosphere, they're just patiently waiting for the possibility we prove ourselves "worthy" enough to hear the message by leaving the cradle.

@jamesdriscoll_tmp1515

8 ай бұрын

Radio noisy primates! Up and down the dial, it's all flung.

@KuK137

8 ай бұрын

@@JesusFriedChrist What if they know about it and send it in a way that only sufficiently competent and developed civilizations can receive? IE ones spending on pure research/scientific projects, not just arms race in space?

@rakninja

8 ай бұрын

@@JesusFriedChrist you're assuming that extraterrestrial life will be earthlike, from an earthlike planet. one thing we know life can do is "eat" radiation to live. it's a rare thing here on earth, but it does happen. imagine, if you will, a planet with no ionosphere where radiotrophic life evolves to be the dominant form. intelligent life from this stock would probably make the same mistake you just did, and assume any life they find will be radiotrophic, from a world with no ionosphere. therefore, they'd send signals that would bounce off of our ionosphere.

This is so cool-I've been a fan of this idea since reading an Arthur C. Clarke story where it was done with a spinning pool of mercury, but I never thought they'd figure out a way to do it with just a single incredibly clever deployable probe. The most obvious objection is whether all the harpoons will find purchase and not glance off a boulder or pomf into a big mound of dust, but maybe robotic piledriving is more advanced than I realize or it can be designed in a way where it doesn't need every single wire to maintain its shape-Or if it's a self-contained probe maybe we can Voyager it and build a few of them so at least one is likely to get them all in. Either way it seems like a fantastic idea for a first look, and if it uncovers the iceberg tips of some exciting cosmic mysteries it can be followed up one day with an actual facility.

Always love watching your videos - and this is probably the only one I’ve understood 100%!! Would love to see (actually won’t see it!) a telescope like this up and running - we can only imagine what we find…

Very enlightening, thank you

If Artemis actually goes as planned and SpaceX SuperHeavy development goes as planned, such a project may very soon become not only possible, but also not astronomically expensive to actually happen.

I've always had the picture in my head that we should have a telescope orbiting Neptune and Jupiter. Relays at Saturn, Mars and the Moon. That would give us the most optimal view distances and would be a testament to our engineering feats. Yes, it would be way more challenging to upgrade them in the future, but at the same time, it would give us invaluable insights.

@andytroo

8 ай бұрын

earth and the sun are still the brightest radio objects around - and the only place where you are guaranteed to avoid the earth is the far side of the moon. You don't get too much extra by going further out. And Jupiter (with its massive magnetic + radiation field) isn't an amazing place for telescopes :) Further out just merges the radio noise from sun and earth into similar parts of the sky.

@GameDevMadeEasy

8 ай бұрын

@@andytroo That is a VERY fair reason for why we haven't done it with our more advanced tech. I would still love to see what type of visuals we would get with a lens telescope that sent images back to us from that distance though. I'd imagine the view of the inner planets would be quite spectacular.

Varying the thickness to change the caternary into a parabola shape is so genius and yet so simple I'm amazed previous proposals hadn't thought of it before

Love this page. Your topics and the information guven is awesome. Helped me understand several topics.

That is such a cool idea! I love the fact we are considering lots of ways to gather data of any/all kinds. It's easy to understand the budget restrictions and whatnot, such as extremely great ideas just too expensive and although likely to be incredible, it's just too risky or costly.... I wonder if it's been considered to put a relatively large number of small antenna type dishes over the surface and use the quantity over large areas that are linked in something like an ad-hoc network maybe in separate clusters of antenna that link up then that information is relayed over larger repeater dishes or network to the side of the moon we can receive proper communication from so that data speeds should be able to keep up with the incoming information much more effectively and less delay I would think. Can't wait to see what's next! Great video! 🍻🌎❤️🎶🕺🚀

@dancingwiththedogsdj

8 ай бұрын

@@nadsenoj8719 I gotcha... I figured it was close to something already considered and all... but hey, it's fun trying to figure all this stuff out! Have a great day/evening! 🍻

@witwisniewski2280

8 ай бұрын

Small dishes will be unusable at the long wavelengths expected from that far away. Instead, an array of wire antennas such as used at the Long Wavelength Array, New Mexico (256 antennas) or LOFAR across Europe (12000 antennas) would achieve astounding sensitivity on the Moon.

@dancingwiththedogsdj

8 ай бұрын

@@witwisniewski2280 that's more of what I was thinking but maybe start with smaller clusters and scale upwards when viable... I'm sure someone will come up with something awesome and crazy and probably 10x better anyways lol just fun to think about 😁 Enjoy your evening!

I've always been confused about the red shifting of light. I understand (mostly) the concept, but my question is, does light get red shifted all the way down to nonexistence or is there a remnant of some sort? energy and/or mass just doesn't stop existing, right? Can light that has lost nearly all of its energy change from its wave/particle duality into something below the known spectrum?

@TheTuttle99

8 ай бұрын

Ooooooh that's a really good question and now I must know

@DFPercush

8 ай бұрын

As far as I understand (not a professional), it can only asymptotically approach zero frequency or exponentially approach infinite wavelength. It never truly disappears. Only in the case of a black hole would it even be a question, because even the farthest reaching photons from across the cosmos are "only" stretched by a factor of a million or so. But in black holes, it's not red shift that swallows the photons, it's just the fact that all geodesic paths inside the event horizon lead to the singularity. There's no escape route, red shifted or otherwise. Although during the process of falling in, you can have photons that are emitted from near the horizon that are extremely red shifted due to the time dilation. So there's a limit as you approach the horizon where photons from a source there would approach infinite wavelength. Of course that would make their exact position highly indeterminate. And it would blend in to the Hawking radiation from the black hole as the wavelength reached the size of the BH itself, in practice becoming undetectable via any instruments available. Also bear in mind, the law of conservation of energy does not apply to cosmic inflation, as the underlying symmetry is broken on that kind of scale. There was an episode of Science Asylum about that. I'm not sure how to explain the red shift due to gravity of General Relativity in those terms though.

@garethdean6382

8 ай бұрын

In th4e case of gravitational redshift, mass\energy is conserved. A photon escaping a gravity well is equivalent to a tiny rocket, pushing itself up by ejecting something behind it. The energy lost by the photon is kept by the massive object. Any observable photon will never be redshifted to nothing, that's not physically possible. The ones we think of at doing so will either be trapped on the event horizon of a black hole or fall into it. On a cosmic scale it's a bit more tricky. Traditional energy is not conserved, but something more broad, involving the 'energy-momentum four vector' IS. There too a photon cannot be redshifted into nothing, there must always be something remaining since a real particle cannot just cease existence.

It's funny. When you consider the entirety of _all_ KZread viewers watching _all_ the different videos available on KZread, the majority of viewers probably want to meet movie stars and "influencers"... In contrast, I'm jazzed that I was able to attend in person (on two different occasions) lectures by Roger Penrose. And I would love to meet Matt O'Dowd and other physicists. These kinds of people are *my* heroes! 😎👍

… I’ve always been impressed with the care you’ve taken in pronouncing foreign names, names of scientists, etc., and now the Latin feminine plural suffix, -ae, pronounced, just as my Latin teacher said! You’re doing much better than almost any biologist :-)

I've always wondered why there wasn't already a radio telescope there

@TheTuttle99

8 ай бұрын

Yeah I've always wondered why things cost money

A Super Arecibo Observatory, yes, please can we also have a Mega Gran Telescopio Canarias as well. Great video, as always.

@delwoodbarker

8 ай бұрын

Rest in peace, Aricibo, maybe we could name the one on the moon after you?

@quillaja

8 ай бұрын

@@delwoodbarkerBricibo

@evangonzalez2245

8 ай бұрын

Arecibo II (but pronounce it ay ay!) lol

Thank you Matt and PBS Spacetime!. Great episode! Audio volume is kind of low, though..

So cool ! A new video from Don @ Fermilab and "PBS Space Time", on the same day !

Have any moon orbiting space craft trained their radio band antennas towards deep space while on the dark side? Or have their orbits precluded that.

@mjmulenga3

8 ай бұрын

The antennae on spacecraft are way too small for the wavelengths of interest.

@garethdean6382

8 ай бұрын

No, there's generally not been many that orbit the moon and they've had poor resolution since none were especially designed to pick up generic radio signals. They were all built for other things.

Boy do I sure hope they figure out a viable way to make this.

Next project: building the 11 Megameter Lunar Circumference Particle Accelerator.

Almost every other thing I watch on KZread is really just a distraction while waiting for a new space time episode to drop.

0:00: 🌑 A giant radio telescope on the far side of the moon could allow astronomers to see further back in time than ever before. 3:40: 🌌 The lunar crater radio telescope could provide a glimpse into the cosmic dark ages and help understand the early universe. 6:51: 📡 The video discusses the importance of a giant space radio telescope on the moon for detecting and studying radio waves. 9:48: 🌕 The Lunar Crater Radio Telescope (LCRT) is a proposed fixed-dish radio telescope on the moon that uses a unique hanging design. 12:49: 🌌 NASA is considering turning the far side of the moon into a giant radio telescope to peer into the time before stars at the beginning of space time. 16:07: 🌌 Dark matter can potentially diminish over a long timescale, causing galaxies to fall apart. 18:34: 📺 The video discusses the random nature of particles and how they can affect spacetime. Recap by Tammy AI

7:09 photon size when the universe was 17 years old, missed it by just a few orders of magnitude guys 😋

@lordmuntague

8 ай бұрын

17 - that might be when the universe was old enough to have a ham radio license...

So cool. Great episode!

That would be fascinating.

If they do this, I think the crater it ends up in should be called Arecibo Crater in memory of the late giant. Then we get an Arecibo telescope back again :)

Man if the world was at peace we could discover so much more within a human lifetime!

@kennethterrell1167

6 ай бұрын

Isn't this the truth, but some people would rather have a yacht than progression for others.

Excellent video, keep the hard work.

Matt, don’t forget the 20Mz noise from Jupiter - an HF radio wave can penetrate the ionosphere if the angle is correct, it doesn’t always bounce off into space.

@oasntet

8 ай бұрын

Yeah, HF radio waves interact with the ionosphere in deeply strange and unpredictable ways, depending largely on space weather. Sometimes that 20MHz can come right in, sometimes it bounces off, on rare occasions it comes in and then bounces around inside the ionosphere and makes a real hash of the 15M band.

I wish I were a billionaire so I could give NASA the money they need for the project

A VERY INTERESTING & EXCITING PROJECT LET'S DO IT ! ! !👍

I'd love to see a video about the Solar Gravitational Lens Observatory next.

👇*sips tea and enjoys a new episode button*

I am cool with using my tax dollars for a moon telescope, but the middle-class homeowners are just going to say we need that money for more bombs and weapon's.

@chawk1637

8 ай бұрын

Hey there. I'm a middle class homeowner and I see a moon telescope as a much better use of tax dollars than the billions used for bombs and weapons for Ukraine. Most of the middle class homeowners in my neighborhood would agree. The middle class is not your enemy. Don't hate on the people who have managed to eke out something decent for themselves.

@centralintelligenceagency9003

8 ай бұрын

Barking up the wrong tree. Middle-class homeowners have no say in tax spending. I think you have some kind of political bias against people who own property, maybe out of envy.

@chimken6090

8 ай бұрын

@@chawk1637​​⁠​⁠Ukraine isn't being sent money or new production, we are sending them old equipment and munitions that we are already paying to store, guard, and decommission. With some munitions we actually save money by giving them to Ukraine.

@chawk1637

8 ай бұрын

@@chimken6090 That's not true. There has been billions of dollars allocated to Ukraine, and while most of that has been military aid, a very significant fracrion has been financial aid. There is also humanitarian aid being given, but that sum is less significant. Even if we are gifting old property, as you imply, we still paid to produce it. And we could still sell it, as we often do with outdated military hardware. No matter how you try to phrase it, the aid we are giving Ukraine has a cost to taxpayers, and that cost is over 75 billion dollars.

@chimken6090

8 ай бұрын

@@chawk1637 That is true, but it's not like not giving Ukraine the aid will suddenly lighten your tax burden. Regardless of if we send equipment you have already paid for that equipment. You also pay for the aforementioned storage, guarding, and decommissioning of said equipment, so sending it to Ukraine quite literally saves you money. Nobody wants to buy the cluster bombs because they are outlawed by treaty (Russia has already used cluster munitions so the treaty no longer applies to Ukraine). As for the rest of the aid, we spend 801 billion dollars on the military each year, 220 billion of which the Pentagon was unable to account for. In the grand scheme of things, even 75 billion to Ukraine over the course of the war is helping us to beat our main geopolitical rival, defend a nation trying to align with the west, and get good PR for all of this. Also, the 75 billion you quoted is the total valuation of aid provided to Ukraine. Of that figure, 26.4 billion is financial aid which is mostly loans. That 26.4 billion is insignificant on the scale of the federal government and is almost guaranteed to have some return.

Yes. We should do this.

Great video as always Matt, have you done a video on/are there any proposals for, the building of a rotating ring orbital station to allow longer term stays in orbit?

LMAO Matt, that last one man, cracked me up.

10:53 catenary! i used to work with those all the time when doing EM field studies on high power transmission lines. line tension and weight are your two variables iirc, plus temperature sag. (whoa, changing the thickness of the line to change the shape of the curve, that's rad)

You had me at space hammock...

Quite great to get a episode from Space Time for sure.

@TheTuttle99

8 ай бұрын

Are you a bot?

@philipmurphy2

8 ай бұрын

@@TheTuttle99 Bots most be getting smarter these days if so.

Love the ET lurking besides Matt's right ear eg 04:34... nice joke by the team.

i hope i am still kicking when they made this. Godspeed and good luck to the engineers.

When Matt O'Dowd used the term "radio photon," it threw me for a loop. Working with advanced radar in the 80's and 90's, we never used the word transmitting or receiving "photons" unless working with LIDAR. After a bit of research, I came up with the following hypothesis. Hypothesis: Electromagnetic waves are not photons, but photons are quantized electromagnetic waves. Modern electronic transmitters like radars and radio communications can transmit electromagnetic waves of almost any duration, even simulating one and one-half photons. Therefore, electromagnetic waves are not photons.

Started off studying electronics in '73 and fell in love with physics. I had no idea we were so ignorant in astronomy at those frequencies, as soon as you set up the problem, it is like well duh, the ionosphere. wow and a whole new data set for sky guys ...

Great stuff!🌌☄🔭🚀🙌

I think the best prospect of this is that if each array is only 1.5 to 2 tons, maybe multiple could be brought up in a single payload. We could haul up 3, if not 4+, and put them at very different points on the moon to achieve very different vantage points (also if one fails/crashes, we can still be happy with the other functional ones, not a total waste). Then, the orbiting relay could be put on a path to gather info from all of them as efficiently as possible. While looking into historic space is cool, continually looking at the rest of the Milky Way is equally important and the more eyes we have in space means the faster we learn in all directions! Plus, a moon telescope is just a dope idea.

This idea sound really cool!

Thank you to the Space Time writers for discussing the geometry correction in terms of carefully adjusted cable thickness, Real Engineering's discussion of carefully arrayed weight(s?) was much more confusing. Even though of course a thicker cable will also be slightly heavier. But thickness just intuitively clicks better.

Real engineering vs PBS space time, game on. Edit : your take on it is better (as expected)

This idea is probably the best idea ever created by man. It would make me cry if I had any tears left. I'm not surprised anymore that we could even conceive of such a contraption. Lol. Though, I'll probably cry when I hear that we actually did it.

Would love a "PBS spacetime/Matt reacts to Startfield" video! And/or other similar Sci-Fi analysis videos would be HUGE and fun!!

It's like observing birds, insects and plants using infrared and ultraviolet light - a complete new view of the same old things we know! I'm very excited if they build it!

I'd love this, mainly because it kicks ass.

The concept was enough to convince me. Let's do it!

Antenna array telescopes are vastly more flexible than dishes. The modern array digitizes the actual wavefront over some large area, essentially receiving all incident radio waves at once. Numerical processing then selects a direction or beam to look with, numerically focusing on an object. Multiple beams in diverse directions can be observed at the same time and each beam is instantly steerable. The limitation is data bandwidth for conveying the wavefront to the computers, and the processing bandwidth of the computers themselves.

Yay, a new episode

thanks for answering the only question I had. what such a telescope would be able to see.

The manga "space brothers " had a good moon telescope idea... i highly recommend this series...

Wicked cool episode, bud!

Let’s get it done

The industrial production of the construction drone and Starship will make many dreams come true.

When Starship + Booster get going missions like this would be at most two flights for what is needed to build things like this.

@Bora_H

7 ай бұрын

Bring a few Tesla Bots along for general purpose contruction and maintenance. Nice!

................ Space Time. Thanks folks, another great episode. =)

I though that it would be necessary a little "city" on the moon to maintain this kind of telescope, but this video shows that there is a way to simplify this process.

Why do I press the like button even before the video started? Force of habit on PBS Spacetime.

Very exciting!

I’m also not NASA but obviously this project is worth realising. Even just to test the technology of installing the mesh in a crater makes it worth it. I can inmagine similar tech could be used to build an instant crater base / shelter

Those grappling hooks are going to be very interesting to calculate the shot, very little gravity

@DFPercush

8 ай бұрын

I would be worried about them not sinking in and grabbing hard enough, then slipping when they try to stretch it. Seems like you would need a rover to drill anchor points for them at least.

@Eagle3302PL

8 ай бұрын

Maybe send a rover to drill holes and mount anchor rods. Then send the telescope with lighter anchors that the rover can pick up and mount after they are fired? It'd be 2 missions and cost much more but also more reliable. The rover can be given a secondary mission to make the cost justifiable.

Literally the plot of space brothers