JWST Worth the Hype? How to Build a Wormhole? How to Pass Van Allen Belts?

JWST Worth the Hype? How to Build a Wormhole? How to Pass Van Allen Belts? | Q&A 195

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Күн бұрын

Are there alternatives to CMB? Will we ever build a space elevator? How can we see radiation coming from a black hole when nothing can escape it? Can you heat something with gravitational waves? Why JWST can look lame to the laymen? All this and more in this week's Q&A with Fraser Cain.
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00:00 Intro
01:32 [Tatooine] Neutrino Background Radiation and CMB alternatives
08:56 [Coruscant] Can gravitational waves heat a planet?
10:39 [Hoth] Why do stars seem to change colour?
13:00 [Naboo] How can radiation escape black holes?
16:18 [Kamino] How to pass through the Van Allen belts?
20:07 [Bespin] How do wormholes work?
22:55 [Mustafar] Is JWST really worth its $10B?
28:15 [Alderaan] Misconseptions about telescopes
31:49 [Dagobah] Will we ever build a space elevator?
36:34 Outro
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Пікірлер: 324

@andrewmoore7601 Жыл бұрын

I really like how you began your answer for Bespin by stressing that wormholes are a mathematical theory, but then didn’t dismiss the rest of the question out of hand. Very well presented!

@frasercain Жыл бұрын

Awesome, I'm glad you enjoyed it.

@MrGeeeMac Жыл бұрын

"They know just enough to get themselves into trouble". Perfectly put. The KZfaq comments section truly is the spiritual home for the Dunning-Kruger effect. Everyone feels your pain, Fraser.

@redcirclesilverx4586 Жыл бұрын

Mustafar good job man, I would just walk away from a question like that. Keep up the always awesome work

@aetoski8724 Жыл бұрын

I've been watching space and physics videos since I was a kid, and yet, you always manage to teach me something new

@CrasyFingers Жыл бұрын

yesssss!!!!!!!!!! one of my questions made it! that made my day thank you

@johnvictor9071 Жыл бұрын

It was fun to watch this live. And fun to watch it again with the visualizations.

@DanaNourie Жыл бұрын

Fraser, I really enjoy these Q&A videos you do. I feel like I learn so much, and interesting questions come up that I didn’t think of. Also love your video news. You do such a super job explaining space science. I was never interested in rockets until listening to you. Thank you!! Yes I am a patreon member and encourage others to join!

@nickdiamond7595 Жыл бұрын

Hey I just listened to this podcast earlier today at work. Now I get the visual aids.

@dsewtz3139 Жыл бұрын

Question Coruscant was the most interesting question for me, but your answer to Bespin was the best answer... how will this count?😉 Instead of twisting around the stargate/wormhole to the starting point, I would wave towards Mars, hop in my 101% lightspeed vehicle (warp or beam or instant acceleration), go there, wave back towards earth, go back and stop myself from going while watching that other me waving from Mars 😁 - Would that be the same? Thanks 👍

@ioresult Жыл бұрын

Naboo: your description of the environment of a black hole is magnificent.

@poletooke4691 Жыл бұрын

Excellent show!

@frasercain Жыл бұрын

Thanks! I'm glad you enjoyed it.

@JusNoBS420 Жыл бұрын

Tatoonie - Crazy to think that the “snow” you see on old TV’s with rabbit ears is partially filled with photons from the Big Bang. Also I’ve seen an underground “pool” for a lack of a better word that is cylinder in shape and filled with water. Where a scientist can sit in a row boat and witness neutrinos light up as they pass through the Earth. And the fact that these things pass through matter like the Earth like it’s not even there. Blows my mind

@johnwilliamson7526 Жыл бұрын

Great video!

@mhult5873 Жыл бұрын

Alderaan Thank you so much for always great content!

@Life_42 Жыл бұрын

I love this channel!

@NeuroD369 Жыл бұрын

On the JWST, if I may, we were told our understanding of the universe would multiply exponentially, we are looking for something to do that for us as individuals. I might add it wouldn’t be that difficult to achieve for most of we individual layman. So, one might explain JWST like this: “Webb is like the invention of the telescope in that it will answer whether the Moon is actually made of rock or cheese. How valuable is ‘that’ to you?”

@delveling Жыл бұрын

I totally related to the gaming explanation about james web "upgrade" :D

@echo1271 Жыл бұрын

Hey Fraser. Regarding Andrew's question about Neutrino Detection, or more specifically your reply about the method, you mentioned that the idea was to be able to use the detection to be able to turn telescopes to s star before it goes supernova. I was wondering if we had ever got an image of a supernova (it's moment of implosion/explosion). Thanks. Astro... Tatooine btw. 👍🏻

@frasercain Жыл бұрын

We haven't so far, that's the whole point of the neutrino detection network, so see the neutrinos first, then watch the star to see the supernova.

@tonywells6990 Жыл бұрын

@@frasercain Astronomers are getting close to seeing a supernova in real time. SN2020tlf was seen before and after it exploded, as well as a few more that were observed many days before they exploded after a 'precursor emission'. I suppose it's just a matter of luck, until we get the neutrino detector.

@paulharland7280 Жыл бұрын

@@frasercain How close have we come? What's the youngest supernova to be photographed?

@smeeself Жыл бұрын

Bring on Veras Rubin!

@dextrovix3057 Жыл бұрын

Hoth. Enjoyed both the question and the answer!

@doncarlodivargas5497 Жыл бұрын

Alderaan: regarding the question about speed of causality, if anyone protest and claim you are wrong, you can ask them to describe an event in the universe that have not reached us yet and when it happened back in time

@frasercain Жыл бұрын

Hah, great idea. I'll try that.

@geoffstrickler Жыл бұрын

Understanding causality (and how it’s based on “c”) is perhaps the most important factor in understand interstellar events. Yes, it matters within the solar system, but with delays measured in under 1 day. Terrestrial events have a sub second delay, or at most a second if satellite communication is involved. Even the 2.5 second round trip time to the moon is perceptually almost “instant”. Makes it difficult for many to integrate the speed of causality delays into their experience of things being “instant” and “simultaneous” to all observers. It takes deliberate effort to understand how “slow” the speed of light/causality is in comparison to stellar/interstellar distances. Once you grasp the communication delays, then you can begin to grasp why causality means things don’t occur simultaneously for observers who are at notably different space-time distances from an event.

@elCamo12 Жыл бұрын

Love your channel, love your explanations. You are serving an essential service to mankind (just my humble opinion).

@Nefertiti0403 Жыл бұрын

James Webb Is A Brilliant Piece ❤

@Amidreamingnow Жыл бұрын

I got to say that i understand the comments of the person that is not impressed with the James Webb Telescope. And I'm a guy that has been informed and know what it takes for the instruments to take these great images. I'm also not that blown away ...i had bigger expectations.

@herberg75 Жыл бұрын

Thank you so much 👌

@pewterhacker Жыл бұрын

Maybe a good way for the average Joe to think about what the James Webb is like to astronomers ... It's like suddenly being able to afford seats three rows back from center ice when, until now, you were only able to afford tickets in the nosebleed section. Being that close would give you a completely different appreciation of the game.

@OzoneTheLynx Жыл бұрын

I loved Coruscant the most.

@scisher3294 Жыл бұрын

OMG!!! your cacophony of sports metaphors caused me to spit crackers and soda all over my dashboard 😂😂😂😂😂😂. Well done sir. Well done.

@OzzyMandias Жыл бұрын

How long would you have to wait in a Space Elevator if you hit the Emergency Assistance button?

@onesunghero Жыл бұрын

Will web take a look at Tabby's star to see once and for all what causes it's dimming?

@etucker Жыл бұрын

Bespin. I think it would be interesting to see an episode where you researched concepts that were science fiction in the past and then proven to be science fact in the present

@quantonica5348 Жыл бұрын

The 1961 movie Voyage to the Bottom of the Sea was about the Van Allen belt catching fire , super high tech nuclear submarine tries to save the day.

@brainbark Жыл бұрын

Another great show! My question: When do you think that LISA, LIGO and other gravitational wave detectors will allow us to "see" the opaque era soon after the Big Bang?

@geoffstrickler Жыл бұрын

Interesting note related to sn1987a. On the day after that was detected, I discovered that an entire box of 50 floppy disks on which I had data had been partially corrupted. The sectors affected were on opposite sides of the center of the disks, suggesting a strong EM field arranged along a plane going through the entire box. And identical box of 50 disks sitting right next to it were not affected, suggesting the plane was at least 30+ decrees from horizontal such that it wouldn’t intersect the box next to it. Neutrinos are obviously not a likely candidate given how little they interact with matter and all 50 disks were affected. But some type of electrically charged particles, or hypothetically, a micro-mass (primordial) black hole could potentially have caused this damage. Can’t prove it was related to sn1987a, but the timing and lack of damage to the disks just 6” away and lack of issues with the computer ~2ft away make it difficult to dismiss a connection to particles from sn1987a.

@SpaceCadet4Jesus Жыл бұрын

Neutrinos are so elusive to catch and so abundant from everywhere in space that eventually isolating some won't really tell us anything about the universe's birth. Like trying to discern a pin in a pile of ...oncoming pins.

@jefborocz836 Жыл бұрын

Question: if you could controle JWST for a day, which objects would you observe and why?

@jeffmathers355 Жыл бұрын

Fraser you must be proud that most of the Stargate addresses lead to somewhere close to Vancouver 😆👍

@seditt5146 Жыл бұрын

HOTH : I had to vote for this one because Extremely early in my astronomy journey I was convinced it, and a couple other stars were Nebula since they were pretty much the only thing in my Binoculars that had any sort of color like I had seen in the books I read. I mean, to be fair I was only 8 years old at the time but shaking the binoculars quickly and seeing hundreds of different color trails coming from what was almost surely Sirius was a pretty cool experience to me and lead me to my first Note taking trip(obsession...) in which I jotted down and categorized all the Messier objects making a many page long table with its catalog number, magnitude, type, location, suspected distance etc...etc.. Hell, it may even be where I got some of my Art skills which are rather high now as I obsessively drew images of every single object I could find a picture of. Now, partially because of that experience I can sit down and draw damn near anything down to the most minute detail with almost every medium I have ever attempted to work with. I now specialize with water color as it allows me to get the most life like colors and I can only imagine what I could have done with them when it comes to painting Nebula and Galaxies. Matter fact, don['t have to imagine. I think ima go paint myself a Galaxy or Nebula. Orion comes to mind... maybe with Sirius off to the side or something.

@niclas3672 Жыл бұрын

How dim would the sun be when standing on Titan? More specifically, what would it look like on Titan's surface relative to what we know here on Earth?

@HebaruSan Жыл бұрын

To get the Sun's brightness at Saturn relative to its brightness at Earth, divide 1 by its distance in AU (9.5) squared: 1/9.5/9.5 = 1.1%.

@dermotmccorkell663 Жыл бұрын

Probably you melting in the methane rain.

@nicholashylton6857 Жыл бұрын

@@HebaruSan Is that adjusted for the cloud cover?

@niclas3672 Жыл бұрын

@@HebaruSan True, but it's a bit more complicated because of the thick atmosphere

@niclas3672 Жыл бұрын

@@dermotmccorkell663 Methane isn't inherently dangerous. It's obviously cold so you would need a suit with some great insulation, but other than the methane rain would probably just be cool to experience.

@Beldizar Жыл бұрын

Alderaan: So, Vertasium did a whole video on the fact that we can't actually measure the one-way speed of light, all our measurements are necessarily measuring a round trip speed of light. So it is possible that light travels towards an observer instantaneously, and that light emitted from an observer travels at 1/2c. If this were the case, then that Supernova really did just happen when we saw it.

@MrMegaMetroid Жыл бұрын

Light delay is a thing even in known orbits of planets. If light would behave different when it comes towards us, we couldnt still see the remnants of the big bang, we wouldnt percieve the delayed orbits of planets and we wouldnt have any delay when probes like voyager send images with time stamps on them. Neither of those things require a signal to be sent from us.

@intrepidca80 Жыл бұрын

@@MrMegaMetroid Beldizar is correct. Whether light travels at c in all directions, or instantaneously in one direction and c/2 in the opposite, or even something more exotic like what Beldizar describes (toward an observer instantaneously, and away from the observer at c/2), is entirely a convention (like deciding between metric or imperial units is just a convention). I.e., it's not even the case that one is "correct", and that we can do experiments to verify which is correct. There is no experiment that can be done... you must first *decide* what you want the one way speed of light to be (as long as what you decide is consistent with the round-trip speed of light being c), and then you can do all your physics with that assumption and the math will work out. For the phenomena you mention, under an anisotropic convention, I believe you would calculate that time dilation would be affected differently depending on direction and that would compensate for the differences in the speed of light in different directions.

@intrepidca80 Жыл бұрын

Also note that this isn't some new discovery. Einstein understood this: "That light requires the same time to traverse the path A -> M as for the path B -> M is in reality neither a supposition nor a hypothesis about the physical nature of light, but a stipulation which I can make of my own freewill in order to arrive at a definition of simultaneity." Chapter VIII in Relativity: The Special and General Theory, Einstein (1916).. note that in this quote M is the midpoint between A and B.

@jensphiliphohmann1876 Жыл бұрын

The vid was great but the example numbers for the speed of a signal (∞ one way, ½c the other) weren't. In this case the universe should look very much less uniformly, and there is no theory for such an idea. At the other hand, the impossibility of _interpretation- independently_ (!) measuring the one-way speed of light is not a bug but a feature since it's crucial for the principle of relativity since we could otherwise compare the speed of light in several directions to each other and conclude our own (absolute) velocity from the outcomes.

@jensphiliphohmann1876 Жыл бұрын

@@intrepidca80 I agree on the fact that we cannot decide between the possibilities of a) the speed of light with respect to me as an observer being isotropic equal to c and b) the speed of light being anisotropic in the sense that it's greater than c in one direction and less than c in the opposite one. This is a matter of convention ore, more accurately, interpretation, namely whether I consider myself as stationary or as moving at roughly constant velocity. However, I disagree on the possibility that the speed of light were infinite in one and ½c in the opposite direction being kind of equivalent or basically indistinguishable from it being isotropic. This may hold for a special scenario like the Earth - Mars communication in the Veritasium vid if we blend out the rest of the universe. For example, an infinite speed of light should result in an infinite wave length, given a certain finite frequency. And this wouldn't stay unnoticed if one conducted a scattering experiment.

@foxyboiiyt3332 Жыл бұрын

Go Sportsteam! I love science stuff and sports. It's possible to do both. That said wormholes and black holes kinda melt my brain but I wanna know more!

@LaC64 Жыл бұрын

24:31 Honestly, yes I think people were expecting something this big.

@ivantuma7969 Жыл бұрын

Love the sports analogy with gobbledygook that would sound perfectly plausible to anyone equally lukewarm on sports jargon and stats. It was like a stream of random "thoughts" from and AI that was just beginning to train as a virtual sports announcer.

@PranshuSRaghuvansh Жыл бұрын

@27:40 Final boss would be the deep fields, I know I am most excited about those.

@samhill206 Жыл бұрын

Fraser, if the speed of light was instantaneously and we could see Andromeda at its *current* distance (not as it looked 2.5 million years ago), how much bigger in the sky would Andromeda appear? Thank you.

@rickkarrer8370 Жыл бұрын

For the justification of the cost of James Webb: $10B is a lot on the scale of a human life (even many lives), but it's very little in terms of the scale of humanity as a whole. Webb moves us along as a species. I can liken it to the ability of procuring and working iron during the booze age. [Slightly simplifying things here] Iron work (and later steel) was too difficult at first, and took a long time for humans to perfect the process (mostly due to achieving furnace heat). Iron typically appears in the middle of the booze age. So, while iron wasn't important to most people for a very long time, it needed to be worked on and perfected, over centuries, for later people to use. Basically, someone living in the middle of the booze age would have not been affected by iron, but thousands of year later, it's a major component to our every day lives. Web is a stepping stone in obtaining knowledge and technology for what will likely become important to future society. Just like many humans before us, we now have to pay forward the technological advancements for future generations.

@TheyCallMeNewb Жыл бұрын

Tatooine question one, as I haven't heard of a neutrino background concept despite it being sound.

@jensphiliphohmann1876 Жыл бұрын

On MUSTAFAR I love the answer, the comparison to sports.

@robertmason5676 Жыл бұрын

Alderaan . Nothing wrong with a little fire in the belly while maintaining Canadian persona Fraser. Oh, as for the answer it was entertaining and informative. Perhaps some more viewers will learn to dig a little deeper. Thank You

@jonathanhughes8679 Жыл бұрын

The information has just become aware to us.

@BG101UK Жыл бұрын

I think *tattooine* is the best here although they are all good ones. It's easy to overlook the fact there are other ways of seeing into the early universe, since the CMB gets (almost) all the attention.

@heaslyben Жыл бұрын

Greetings! I was watching/reading about the excellent DART orbital change results released recently. I appreciate that UT mentioned the *expected* orbital change of 10 minutes, where other outlets are only mentioning the *minimum* successful orbital change of 73 seconds. The question that pops into my brain is -- was there a theoretical *maximum* orbital change to compare to as well? Like on a scale of 73 seconds to asymptotic-best-change-ever, is 30 minutes around 25%? 75%? Thanks!

@olivermcdonald Жыл бұрын

The best SF on wormholes is TimeMaster by R.L. Forward.

@brick6347 Жыл бұрын

Here's a question (you have probably answered it!): Is it possible that the Earth once had a second, much smaller moon (like Phobos or Deimos) that eventually broke up, with some of the rubble crashing into the Earth and some leaving a planetary ring for a few million years. Rings would cast shadows on the tropics, drastically lowering the earth's temperature, leading to an ice age, which is what we see at the end of the eocene. Furthermore, I'd hazard guess that evidence of a ring would fall around the equator, most of which is under the oceans or covered by rainforest so pretty hard to find.

@paulharland7280 Жыл бұрын

I've been wondering whether a solarsail craft traveling along one of the gravitational focal lines of the sun would get a boost from the focused light from a distant star there.

@Daddyoh94 Жыл бұрын

So I don't know how feasible it would be, but I think it would be really cool to see a falcon deploy from a starship. Like as if the core of the starship is a falcon and it separates from the inside, but then Idk how starship would navigate with a ring of engines

@TimRobertsen Жыл бұрын

I have a question!: Is the expantion of the universe "stealing" energy by red shifting radiation? Where does this energy go? Is it just lost to the fabric of spacetime? Or is this energy suspended in spacetime? Like stretching a rubberband. What happens if this rubberband snaps :p

@bryanhager5403 Жыл бұрын

Thanks for a great show. On the last question I agree that Starship will help to build space infrastructure. What it does not do is help to build a earth-space economy. In order to support a growing human population and economy we will need to bring resources to earth. Mining and manufacturing is messy and the moon(and moon orbit) will be a great place to do that. Then we will want to bring that material to Earth. We will need some kind of transportation system to move that to Earth. Orbital habitats will also create demand for cheap and safe people transportation to and from earth. My bet for that system is an equatorial orbital ring at 100km, rail type shuttles back and forth to Earth, and magnetic accelerators to take you the rest of the way to space. We understand the physics and engineering for this. We just need the materials. But will not happen until next century.

@guillep2k Жыл бұрын

The thing with projects like JWST is that they produce data that will be used for decades, so divide 10 billion by.... I don't know, 20? That's 500 million per year. Suddenly it doesn't sound so expensive as a World project.

@smeeself Жыл бұрын

Exactly and it's going to run (fingers crossed) for 20 years. Papers will we written for half a century at least.

@milobem4458 Жыл бұрын

Mustafar question is a bit tricky. Try to remember when Hubble first went online, especially from a layman perspective. Before that we only had star charts, couple of photos from Vger flybyes and not much else. Hubble showed us the whole new universe, that we only suspected was out there. The whole generation of space-lovers were raised on those Hubble photos, to a point that most of us assume that's what the universe looks like, including the "false" color palette. Now Webb gives us better resolution and some extra details, but "nothing new". I'm not surprised some people expected to see a surface of Betelgeuse or maybe even exoplanets, after hearing about Webb for years. I liked your comparison to a sportsball team. I was wondering whether the terms you used to describe the new player were real or made up. In either case respect for keeping straight face and good answer.

@jensphiliphohmann1876 Жыл бұрын

It's far from "nothing new". We should also take into account that the telescope has been active for a few months, and some "deep field" images just took the telescope a few hours. We may expect much more new.

@TheRotnflesh Жыл бұрын

What a lot of people do not keep in mind when asking if a scientific tool is worth it is how the information (everything is information, and this kind of information cannot be acquired any other way) may benefit them and their descendants. Understanding our universe requires observations of every phenomenon we can see, and utilizing the JWST to see not only what we see, but other spectrums as well, gives us far more insight into cosmic/galactic/universal processes we learn to then replicate on Earth. How much technology has been invented because of space observations or travel? We lie in space, Earth is travelling through it all the time. Observations of how the Earth moved gave Leon Foucault the insight to invent the gyroscope! Come on, people! Tools like this are far better than 500 precise tactical nuclear weapons.

@bob-yd8xv Жыл бұрын

Question: when physicists say space is expanding, do they mean space time itself is physically being stretched? or is more space time somehow being created between objects? More importantly what if any effect does that have on gravity? Specifically the stretching of space time as opposed to just the increased distance.

@irontusk341 Жыл бұрын

35:19 "They had one in foundation... Keyword.. "HAD" 🤣🤣

@frasercain Жыл бұрын

That is also a key risk.

@JusNoBS420 Жыл бұрын

Mustafar~ answer was priceless. 😂you threw out a list of random sports related words from multiple different sports and some of them that don’t even make sense lmao 🤣

@zlm001 Жыл бұрын

One question it my video idea I had was if the massive satellite constellations could be also used to create some type of observatory. Like if they offered a small space in each one for a type of cheap, small detector. They probably have good clocks and are constantly communicating with lasers, so could a radio attenae combine the clock and position signal on each satellite for the constellation to detect very weak signals? What each detector packs in capability is compensated for by having 17,000 if them? Or instead of piggybacking on Internet satellites, what types of observations could be created with a satellite constellation type of observatory?

@rushwal Жыл бұрын

Dagobah Space Elevator convention Going on now!

@NickPoeschek Жыл бұрын

Although I don’t like sand because it’s coarse, rough and irritating and gets everywhere, my vote is for Tatooine.

@joaodecarvalho7012 Жыл бұрын

When people go to space, they usually look to Earth. But the other side must be amazing. Tatooine.

@techforthedisabled9514 Жыл бұрын

@Fraeer Cain when will they look at a Rocky exoplanet? With webb

@markgrayson7514 Жыл бұрын

21:50 Plaid Speed!

@davecarsley8773 Жыл бұрын

8:26 How could a Nuetrino "pass right through the entire universe which was acting like a star and get out into space"? What "space" would the neutrino be getting out _into_ after passing through the entire universe? I'm trying to wrap my head around this concept because we're so often told that the universe isn't expanding into anything, and that no matter what the size of the universe is/was at any given moment in time, there is/was never any space outside of it.

@smkolins Жыл бұрын

Alderaan was pretty good too.

@7777drummer Жыл бұрын

What is the tolerance in nanometers that they have to smooth out the mirrors on space telescopes so that they are very flat?

@bookiemeow173 Жыл бұрын

Thank you for your grear videos. Too bad the live shows are in the middle of the night for me..

@frasercain Жыл бұрын

Sorry. :-(

@royparrish2515 Жыл бұрын

When the Black Hole does 'Fusion' of particles, would it possibly get past the Elemental Iron Energy sink and be able to fuse more massive elements?

@ThePhantomgoose Жыл бұрын

Hi Fraser! Love the channel. Question regarding Webb's field of vision. Not sure if this makes sense, but, is Webb limited in what it can observe based on where the Earth is in its orbit around the sun? From my understanding, the telescope will never view the inner solar system (Venus, Mercury, the sun, etc.) due to it's sensitive instruments, but is there science it can only perform at certain times of the year due to it always needing to be facing away from the sun? Thanks!

@microschandran Жыл бұрын

Hi Fraser, can the cosmological constant be due to energy of quantum fields themself in empty space, and not due to quantum fluctuations of virtual particles in space? Has anyone caculated energy levels of quantum fields themself?

@smkolins Жыл бұрын

Mustafar!!

@CamdenBassett Жыл бұрын

Is there a technical definition of a "point source"? It's very interesting that the planets don't twinkle because they're actually small disks, but I imagine that the further away they get, the smaller the disk would be. At what point (pun intended) does something become a point source?

@montymcneilly Жыл бұрын

Hey Fraser, I was wondering what gravitational waves actually are. I’ve only seen animations of two bodies orbiting each other. Is that the only way to get the waves? Also, what are the actual waves and why do they occur? Tatooine

@frasercain Жыл бұрын

You get gravitational waves whenever masses move. You're literally distorting spacetime, sending out ripples into space that contract and expand as they sweep past anything. You generate gravitational waves when you walk around.

@ericgulseth74 Жыл бұрын

I'd add, that the two bodies, black holes/neutron stars are so unfathomably massive, that we can detect these small waves millions of light years away.

@fep_ptcp883 Жыл бұрын

There's a typo in the video description. It says "[Alderaan] Misconseptions..."

@Chamuzi Жыл бұрын

Hi Fraser. The Boston Vikings would at least have less annoying sports fans than the Red Sox and Patriots. Although Tom Brady is virtually flawless in both looks and athletic skill. Back to the video.

@richardw2977 Жыл бұрын

Re: Mustafar - I realize that $10B sounds like (and is) a lot of money. That said, $10B is only 0.048% of the US GDP from 2020 ($20.94T). So is it a lot? Sure, but on the grand scale of things - not so much. Another consideration - how many jobs were created from this one project? How much of that $10B was in costs for labor, feeding families across America? Even if we don't consider the scientific and humanity achievements, it's been, at minimum, worth it to those involved with the project.

@mbj__ Жыл бұрын

Ice cube neutrino telescope: So a 1km3 volume right now. But can we really go much bigger than 2-3km3? How deep is the ice layer in antarctica at most? That must be a limiting factor, right?

@juhanurmela4341 Жыл бұрын

That wormhole on board, destined for p Centauri, could feed fuel from Earth. And crew could take holidays.

@thetez96 Жыл бұрын

Tatooine & Alderaan

@profflux Жыл бұрын

Compact neutrino detectors currently being deployed by the University of Chicago are far more sensitive than previous generations of tech such as Ice Cube.

@daos3300 Жыл бұрын

dagobah - odd answer. i don't think anyone is seriously proposing a space elevator as a viable option *at this time*, or even in the near future. however, it is superior in every way to rockets repeatedly burning huge amounts of fuel to fight gravity, just to get a few tonnes of stuff into orbit. you only need to build an elevator once. it's like saying we don't need ships to transport cargo since we have airplanes, and yet. however, i agree about the possibility of reduced need for transporting stuff to space going forward.

@fallisangle9046 Жыл бұрын

hello, I have a question about entanglement. how it's established between electrons in the first place. everyone talking about its' existence but no one explain how it starts

@CrasyFingers Жыл бұрын

if i were to add one thing for the sirius color change thing, i think it's more pronounced if it's low on the horizon and if there's humidity, one time i saw it and i COULD NOT believe it was a star, i thought it was some kind of weird plane, but it didn't move in 15 minutes, and then saw it the next day and it wasn't so obvious and visible

@frasercain Жыл бұрын

I should have mentioned that it's the cause of a lot of UFO sightings. :-)

@ostsan8598 Жыл бұрын

I guess Mustafar is best planet this week. I'll be watching out for those Boston Vikings to get the Stanley medal in the World Bowl.

@olorin4317 Жыл бұрын

I think I recall you planned to read the Culture series by Iain M. Banks. If so, what did you think?

@Rob-eg8qc Жыл бұрын

Bloody hell, I darnt get a bath now.

@thomasfholland Жыл бұрын

Gravity wells are for suckers! 😂 😂 That one got me!

@frasercain Жыл бұрын

Hah, I used this quite a bit. :-)

@larnotlars1717 Жыл бұрын

My favorite part of this episode is this episode was 28:59! How often do you see a correction in the Alternate Facts posts?

@Drakcap Жыл бұрын

Thanks! I try to double-check the numbers Fraser says. He's usually close but I figured a correction was necessary here.

@danielmoreno1504 Жыл бұрын

Question.: Why don't we do Nuclear tests in space to understand the collisions of planets and to gain more information!

@SMHman666 Жыл бұрын

Daniel. I don't see how that would give us an understanding of planetary collisions. They did detonate some in space but that was mainly a military exercise which didn't give them the results they were looking for.

@dvabrannon Жыл бұрын

Dearest Fraser, these neutrinos from el bang, had no space to spread out into(??). Theoretically, space had not expanded yet. Space was maybe a few cubic millimeters expanse, no? In the phraseology of The great Gene, how could neutrinos “go, where there was no place to go!”? Pertaining to why JWST is worth Billions o’$: man’s curiosity and creativity and comprehension, is priceless. Lofty ambitious goals are planted in us by the universe itself. The $s are worthless if not serving our souls.

@frasercain Жыл бұрын

The neutrinos have been traveling for close to the speed of light from 13.8 billion years, so we'd be seeing places where they were emitted at that time. They would be very far away now. Remember that the early Universe was probably still infinite, just much more dense with matter and energy.

@RG-qw9ys Жыл бұрын

Are blackhole jets only detectable when they are excreting material? If a naked black hole is out in space, can we detect anything about its magnetic field?

@johnrickard8512 Жыл бұрын

James Webb was worth it if only for one thing - a high resolution infrared spectrometer. This allows us to determine the composition of exoplanetary atmospheres, and I don't think I need to explain why this is beneficial.

@frasercain Жыл бұрын

Yeah, a spectrometer doesn't produce pretty images, but it tells you what something is made of, and that's better.

@Beldizar Жыл бұрын

Dagobah: Correct me if I'm wrong here, but you said that a Space Elevator makes a lot of sense on the moon and Mars. Mars I get, but doesn't the moon rotate too slowly for a space elevator to function? The length of the tether is going to be proportional to the "world's" rotational speed, or length of a day. The faster it spins, the easier it is to keep tension on the cable, the slower it spins, the harder it is to keep that tension. Since the moon is what, 1/28th the rotational speed of Earth, a space elevator wouldn't work. Unless I've got that wrong...

@massimookissed1023 Жыл бұрын

It is possible from the Moon, but it has to be really long. IIRC up to the Earth / Moon L1 point, and another one out towards L2.