An astrophysicist reacts to DOCTOR WHO | The Doctor was wrong about black holes...
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- čas přidán 7. 06. 2024
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Doctor Who Season 2 Episode 8 The Impossible Planet sees the Doctor and Rose stranded on a planet in orbit around a black hole. The Doctor claims this is “impossible” - but is it? Which bits of this episode are based in science and which are most definitely fiction? Filmed for all you Whovians out there.
Watch all the previous seasons of Doctor Who on BBC iPlayer: www.bbc.co.uk/iplayer/episode...
Check out my other “astrophysicist reacts” videos: • Astrophysicist reacts...
Padovani et al. (2017; review paper on AGN showing light emitted by accretion disk across wavelength spectrum) - arxiv.org/pdf/1707.07134.pdf
Bondi (1957; negative mass in general relativity - behind paywall unfortunately) - journals.aps.org/rmp/abstract...
King (2016; how big can black holes grow, equation for self-gravitational radius) - arxiv.org/pdf/1511.08502.pdf
00:00 - Introduction
01:01 - How good is the black hole visualisation?
02:09 - You CAN be in orbit around a black hole
03:26 - A geostationary orbit around a black hole?
05:24 - The Innermost Stable Circular Orbit around a black hole (it’s not “impossible” Doctor)
06:49 - The inevitable radiation burns from a growing, glowing black hole
08:20 - “Gravity funnels”, artificial gravity and negative mass
11:48 - Spaghettification and the self-gravitational radius
13:43 - “the blazen scale” lol
13:59 - Tidal Disruption Events and spaghettification
14:47 - WORMHOLES AND BLACK HOLES ARE TWO DIFFERENT THINGS ROSE
15:58 - Outro
17:28 - Brilliant
18:32 - Bloopers
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👩🏽💻 I'm Dr. Becky Smethurst, an astrophysicist at the University of Oxford (Christ Church). I love making videos about science with an unnatural level of enthusiasm. I like to focus on how we know things, not just what we know. And especially, the things we still don't know. If you've ever wondered about something in space and couldn't find an answer online - you can ask me! My day job is to do research into how supermassive black holes can affect the galaxies that they live in. In particular, I look at whether the energy output from the disk of material orbiting around a growing supermassive black hole can stop a galaxy from forming stars.
drbecky.uk.com
rebeccasmethurst.co.uk - Věda a technologie
There's another Dr Who story with a black hole you might want to check out. World Enough and Time and The Doctor Falls is a two parter that uses the extreme relativistic effects as a major plot device. Would be cool to see if the show has gotten more accurate over time.
Seconded- I'd love to see that!
That’s by far the coolest and most scientifically accurate use of black holes in the show.
I was thinking the same thing, though my issue with that one scientifically is the fact that the reeeeeally long ship managed to stay in one piece while blasting its engines at full power to keep it just a few radii away from the event horizon. Shouldn't it have been spagettified being that close?
Came here for this, yeah.
That episode is a masterpiece. One of my favorites.
The DVD commentary track for this actually makes some of the points about orbits that you do here. They did realize after they shot this that they’d got that wrong and admitted it!
So glad you mentioned this - I'd actually forgotten that bit! Now I want to pull it out and watch again. 😊
Nice!
@@DrBecky The link to your book doesn't for for me?!
See, my only problem in this case is that both David Tennant and Billie Piper are so adorable, I want to believe them
I mean you just need to put the pair of them on screen and my brain switches off, soooo 😂
Suspension of disbelief ¯\_(ツ)_/¯
My favourite pair in my favourite two episodes. I believe in Dr Who 🧚🧚🧚
But not as adorable as our own Dr Becky ;-)
@@sharg0 were she on the show, The Doctor would be Dr. Becky's companion. 😄
I'd love to see Becky in Doctor Who, listening to him babble some technical explanation and then be like '*sigh* You're talking absolute rubbish, Doctor '
I’d love to see that 🤣
Becky is the next DOCTOR.
You can add QI to that list. It'd be great listening to her rattle off facts while surrounded by comedians. Besides, they've already had Brian Cox on twice.
That's why Liz Shaw quit. She recognized what show she was a character on. ;)
🤣🤣🤣
Awesome 👍👍👍
Another episode dealing with a Black Hole is season 10 episode 11. It deals with a 400 mile long Ship escaping from a black hole and time dilation on board.
I mentioned that episode (one of my favorites!), too - and saw at least one other comment agreeing with us!
@@MaryAnnNytowl The more comments for the episode the better. It raises our chances of getting to see it.
When I saw that one I was like "ha ha! The writers must've forgotten that time flows differently the closer they are!" and then they actually remembered.
I'm not even a Moffat hater. I love his writing. I'm just hungry for things to nitpick I suppose.
I think The Doctor's "that's impossible" thing was less "we shouldn't be in orbit" but more so "we shouldn't be alive"
I may be mistaken, but I'm pretty sure it was a "stationary orbit" ...like it wasn't rotating around the blackhole which is why he was so shocked.
Who knows really? 😉
@@Hannah_The_Heretic Indeed, it was a stationary orbit and those can last indefinitely. However, I believe there's a point regarding the Doctor's worries, even though he hadn't heard this information prior to his observation (then again, he probably doesn't need it - reference to episodes like "Kill the Moon" and "Rose"):
Considering the planet's origin is ancient and the story happened in a FAR AWAY future timeline, many eons have passed through the planet. It's interesting how even physicists say: "Oh, he's safe in a stationary orbit because the Moon and the Earth last several lifetimes". That is true, but imo what Dr. Becky skipped in her observations is a thing called "orbit decay". You can't have a stationary prison planet standing for eons on the same orbit and that's why I believe the writer created the weird force tunnel nobody can explain (lets call it weird dark energy... stuff). In fact, orbit decay is a big part of the explanations of spatial relativity and even black holes can merge as a result of a mutual pull. It's a gradual process, but not having a shift is plain weird.
Although, one can argue the Doctor was exaggerating before the need to actually exaggerate, but oh well. 😅
@@ReversedPolarity look at the end of the day its sci-fi, i think we all need to accept and understand that not everything is going to be 100% accurate.
@@Hannah_The_Heretic Indeed, you're not wrong there. After all, there's plenty of outdated scientific facts in previous episodes, but I also think Doctor Who doesn't get enough credit for what it does right in the realm of plausibility, even if it is a work of pure fiction.
It's far easier to dismantle the myths than to prove them even if there are plenty of pieces that tie that world together in many different ways. In fact, Becky does a great job at trying to figure out how a gravity funnel would actually work and I thought that was an interesting thought experiment. I think that's the best part about Doctor Who - to stir some curiosity about the unknown, not to dismiss it.
*geo*stationary
And I much prefer that they make up technobabble than use existing terminology wrong as the latter may confuse people who don't dig deep enough into each scientific bit in the show. It could potentially cause misinformation eg if before the discovery of the Higgs boson they'd said that it meant aliens, then the discovery could've caused people to think "aliens".
Funny that of all the episodes you could have picked to analyze for scientific accuracy, you chose the two-parter whose second part has the literal Satan appearing
I was just thinking that, it’s hilariously one of the best episodes to which is trippy.
Makes no sense. Jupiter or Saturn sure
I think on the "Doctor Who Confidential" shown at the time, 2006, they did point out their black hole wasn't realistic but the "rule of cool" meant viewers expect to see a certain "look" for them. Blame the viewing public or Disney film.
So basically filmmakers think their audience is stupid
@@karlkastor to be fair, the majority is
@@kellydalstok8900 If that would be the majority it wouldn't really be stupid anymore, would it? You kind of have to be below average to be stupid
Season 10, Episode 11 shows a super-long spaceship stuck in the gravity well of a black hole where time flows differently on either end of the ship. Any chance we can see a reaction to this episode?
Seconded, I was about to write this!
Ah yes i remember that, but its just a variation of the time dilation effect, which you can also see in ST:V S6E12 "Blink of an Eye" (Such a fitting name, "Blink" 🙂). Its also in Interstellar with the whole away team and the guy who remains in orbit time passing differently in perspective to each other. In that episode the "bridge" is at the top, a second there is like years at the bottom of the ship.
The thing I remember about this episode is when the Doctor does an energy calculation for the "gravity funnel" and gets 666 somethings per second and I just think did Satan know what units the scientists would be using in the future?
Actually, 666 refers to Nero.
Execute Order 666
I always pictured it as a kind of "the universe is very mathematical so of course any kind of cosmic being of any kind of power would intrinsically understand the Mathematics of the universe".
I don't believe in God, but if a god exists then they know maths 👀
Flat Earthers use that same logic to prove "globists" are devil worshipers: Our axial tilt? 23.4 degrees? Coincidentally that's a 66.6 degree tilt away from the equator!
@@Stettafire Fair, but the point is that the number depends on the units. Say 2 points on Earth are a mile apart. That means they are 5280 feet apart. Neither number is more correct than the other, they're just expressed in different units. The math is the same either way. Likewise, i still remember the speed of light as ~186,000 miles per second. Somebody learning it more recently would rather say ~300 million meters per second. But it's equally valid to say 1 lightyear per year. So if you wanted a measurement to yield a specific number, you have to know what units your target will be using.
If you want a more recent depiction of a black hole in Doctor Who with a more serious take on the consequences of the physics I recommend episode S10E11 "World Enough and Time" which has some cool time dilation stuff going on (may need to watch the episode after too but I think most of the physics is in that first episode?)
The Doctor with Dr Becky as companion,that i want to see!
A perfect duo.🤪
Emma Thorne as the Doctor!
@@Sableagle or Michael Sheen
Thanks for the shout-out Becky. Yes, it was me that made the recommendation. That was just as entertaining as I had hoped, and you discussed pretty-much everything I was expecting you to.
I'm also a horror fan and that was a brilliantly unnerving episode, especially when Toby got possessed and all the symbols appeared on his skin. Did you notice that a lot of the background sound effects were taken straight from Doom, the game?
This seems like a fun enough video to admit that every single time Dr B says "Supermassive Black Hole" my brain INSTANTLY starts playing the bass riff from the Muse song 🤣
It's doctor who you just make up new science when the old science won't do 😂
I think you'd enjoy more episodes of Stargate SG-1. There's one where Carter blows up a star, the season 4 finale I think, that is quite good.
You blow up one start and thats all anyone remembers you for
I love the reaction, educational, and science news bits that you do, thanks! I also totally enjoyed this one, as I am a Dr Who fan, ever since Tom Baker. Brilliant.
👋🏼 Hello, fellow Whovian. I've been there since Pertwee, myself! 👋🏼
Thank you for this info. I probably have never remembered any formulas you mention but appreciate the math and facts. I like when you do comparisons to help us relate to a topic we are more famililar with.
Doctor Who is a fantasy series with sci fi as a backdrop. The characters and story are what it focuses on.
That's one of the issues I have with nuWho. Classic Who resided at the (extremely) soft end of science fiction. With nuWho they pushed it completely over the line into fantasy and make only the barest pretense of it being science fiction.
@@caulkins69 Classic Doctor Who had an ancient race of literal Vampires that fought a war with the Time Lords. It was not any less fantasy than New Who.
I'd love to hear your opinions on the episode, "World Enough and Time", Series 10, 2nd to last episode. Deals with extreme time dilation due to a very long ship perpendicular to a black hole.
I know it's not exactly on-topic, but the music for that episode was wonderful. I would've liked more in that style.
As always, a fun video Dr. Becky! I see your book in the background & I can also see my copy on my bookshelf across the room which is still waiting for your autograph. 🤔🤔
Finally I ave been waiting for this. Thanks.
Fun video! It's always interesting and informative seeing an expert react to something that for most of us would probably pass a squint test, or at least not think twice about. If you're not too tired of Doctor Who, then I'd suggest also checking out an episode from Peter Capaldi's run, "World Enough and Time." It's another episode that prominently features a black hole and black hole physics.
If that's the episode I think it was, they did a creditable job of incorporating gravitational gradients and time dilation into the plot. However, time was moving many, many, many orders of magnitude slower at one end of the ship than the other. I would have thought that, if the gradient was that steep, the ship would have been pulled apart by tidal forces.
It was, in all, much better than the complete dog's breakfast they made of simple orbital mechanics a few episodes earlier.
@@johnopalko5223 I'm sceptical about the amount of dilation occuring over 400 miles that is depicted in the episode.
If anyone is "tired of Doctor Who", my heart goes out to them!
@@JessWLStuart Then you don't know what's been happening since Chibnall took over.
@@johnopalko5223 Didn't their attempt to accelerate out make it worse?
I love your videos… but you definitely gave this WAAAAAY more thought than the writers for this episode did! 😂🤪
I was really hoping you would weigh in on the “science” of the TARDIS.
Also, since you mentioned wormholes… you should do a review of an episode of “Sliders”
I think the Tardis is just a given in the cannon of the show, that's just what allows the show. Their is probably an episode somewhere that explores it tho, and reacting to that could be fun.
perfect timing as I just rewatched this not two days past... one key thing I did remember is that it was almost definitely a supermassive black hole, as they describe the streamers as the "crimson system" being swallowed, which you wouldn't expect from a stellar mass black hole. On the whole, I took the "impossibility" of it to mean either orbiting too slowly and/or within the roche limit (though both are contradicted at points in the episodes)
I enjoyed the one you did on Contact. From watching Sci / fi movies I always assumed the "radio signals" from space were audio, and could be actually heard on a speaker - even as static fuzz. Never realised they were wavelengths of light.
Your new video popped up just at the moment I finished an episode of Doctor Who (S01E08)! 😅
Synchronicity or "great minds"...
@@jerelull9629 Father's Day S01E08
There's an episode of the TV series Space: Above and Beyond called "Ray Butts" which can be found right here on CZcams that prominently features a Black Hole in the plot. Including the title character getting too close and getting spaghettified. Might be worth a reaction...
But if not, as a person who was only very recently introduced to this channel, I must say that your videos are very enjoyable to watch, and thank you very much for putting in the time and effort for making them.
Would love to see more Dr.Who reactions. Cant think of any specific ones off hand though.
David and Billy were my favorite combo.
They were great.
I'm a U-Boat Commander Jacket bearing fan of Eccleston :)
Battlestar Galactica FTL jump drives. I'd love to hear what Dr Becky has to say on that Smeg. Also "So what is it?" White Hole the Red Dwarf episode... Playing pool with planets?!?
But I just love how passionate Dr Becky is.
Fantastic stuff. Thanks 😊.
I hope some sci-fi writer refers to a fictional Smethurst Scale someday.
'That's impossible! It's reading over 5000 Smethursts!'
Thanks for the video Dr. Becky
As the Doctor has said "it's wibbaly wobbly timey whimey stuff" Also, remember River Song's rule number 1, The Doctor lies.
Stargate SG-1 has a black hole episode: _A Matter of Time_ -- the fifteenth episode of the second season.
And it comes with bonus black hole on wormhole action!
Dr. Becky did an awesome review of that last year--highly recommended. Check it ou!
The BEST thing to end Thursday with! You "astrophysicist reacts" series is awesome lol.
i remember this ep, hearing the line about not being able to orbit a black hole, and questioning or down right refusing that
Is there an uncut version of the gravity funnel rant? It looked like that was a lot longer but editing Becky cut it short. If there is, we’re going to need that uploaded immediately.
I loved your attempt to resolve the concept of a "Gravity Funnel" !
One of the Doctor Who tenants (even before David Tennant was born!) is that the power source of the TARDIS is the "heart of a collapsing black hole" called "The Eye of Harmony" and I would love to hear your thoughts on storing a "collapsing black hole" is a "container" which allows one to generate (Vacuum energy? Gravity disequilibrium? ) energy
BTW, I also agree that David Tennant + Billi Piper were THE BEST Doctor Who team!
Hey Dr. Becky, only discovered you a few months ago and I'm loving your videos. Your breakdown of the recent black holes = dark energy paper was fantastic! I would love to see you react to the old Disney film "The Black Hole" if you ever get the chance. One of my favorites from when I was a kid!
Great video. Just bought your book (in fact got the hard and paper copies of it) and love it.
Series 10 Episode 11, World Enough and Time (2017). Another Doctor Who episode dealing with a black hole and time effects around it.
By the way - there is a star somewhere in the core of the TARDIS.
In Episode 10 of Series 7 Journey to the Centre of the TARDIS they see an "exploding star, in the act of becoming a black hole. Timelord engineering - you rip the star from its orbit, suspend it in a permanent state of decay". What can I say... =)
What I love about these sessions is, it’s a science lesson you have when you’re not having a science lesson! So, while I think I’m listening to Dr Becky take the mick out of this story, I’m learning some physics theory. Hang on, that’s not fair😃
Would you consider reviewing the movie Melancholia (2011) with Kristen Dunst? In which a rogue planet crashes into the Earth. How real are the effect portrayed in the movie as the rogue planet gets closer and closer to Earth? Thank you.
Badly needed Dr Who credit: Scientific Advisor - Dr Becky
Yeah, but then Dr Who won’t be Dr Who. It’d probably change to Dr Whom 😂😂😂
There's a couple episodes of The Expanse I would be super keen to hear your thoughts on:
* Home (season 2, episode 5)
* Delta V (season 3, episode 7)
No black holes, but both deal with some really interesting physics questions and depictions. Home especially, Delta V's cool phsyics are mainly near the end... but, if you're keen to watch the entire latter half of season 3 (episodes 7 - 13), those interesting physics get even more interesting.
I'm guessing that what they meant by "impossible to orbit" and "geostationary" is that they were just hovering over the black hole at the same distance and direction.
So it's like they thought "orbit" meant "in free fall, but not falling in" which is true except for the whole sideways motion thing.
I've got to admit, I love Who. In fact, I've seen every existing episode going back to 1963.
Having said that, we're talking about an alien with two hearts who can change their looks, their age, their gender and their personality when their old body gets too damaged, and they travel around in a ship that's bigger on the inside and can move backward and forward in time as easily as you or I walk through a room.
I've got my "suspension of disbelief" knob turned up to "maximum" before the theme music even starts 🙂
You know what does bug me in space movies? Spaceships that _bank_ when they turn. Banking helps airplanes turn. It does nothing in space. Yet, they all do it.
Yes I think a lot of sci-fi fantasy has spaceships acting like planes -it should be orbital dynamics not aerodynamics. We should see thruster exhaust when they change orientation or direction. Also they often have sound effects like planes in the air. Maybe Star Wars started that off - or was it something before that?
Many also have explosions that make clouds (material turning back on itself) -in space the material should spread out in all directions without slowing down as it would where there is atmopsheric pressure to make it look like a cloud. That 'bugs me'!
Hi Dr Becky,
Edit: Now I think I get it, it's all just the accretion disk, but because of gravitational lensing, we are also seeing accretion disk from behind the black hole. Is that right?
In the 1:45 black hole simulation clip you showed, it looked like there was some flowing 'movement' perpendicular to the accretion disk at the surface of the black hole and passing through the BH poles. Is that accurate? Or just an artifact of the simulation.
If it's real, is that the photon sphere/event horizon and why is it circling in a manner passing through the poles and perpendicular to the disk.
What you're seeing is the disk behind the black hole . . . the light from the disk having been bent toward you by the gravity of the black hole.
@@jpdemer5 Thanks, yeah I eventually figured that out (in the edit). It should have been obvious right away! I'm still curious whether there is some specific direction of orbit for the photon sphere (or any of the other horizons) as a result of the rotation of a black hole. Like I read something about material touching the poles more closely for the ergosphere, but I can't really picture the orbit.
That is my understanding, so yes. What they have skipped is the orbits are fast enough the particles moving toward you should be blue shifted.
@@sophiophileRemember a black hole is a 3 dimensional collapse of space time. There are no "poles". It doesn't matter the angle that you look at it, what you would see would always be the same. Like Becky said in the video, moving from thinking in 2d space to 3d space can play tricks on your mind.
@@barrymak421 not sure why my reply got deleted, but when I said poles, I was referring to the axis of rotation for a black hole with non-zero angular momentum. When a black hole collapses, all of it's angular momentum is conserved, and that creates a distortion/drag on spacetime equatorially (in relation to the axis of rotation) called frame-dragging This means that the motion of particles and light nearby to a black hole is not isotropic in all 3 directions. Look up the shape and definition of a black holes 'ergosphere', and you will see that the gravitational influence is not uniform, and people do refer to 'poles' for rotating black holes, as the direction that relativistic jets emerge from rotating black holes.
In fact, a rotating black hole with sufficient angular momentum (which is many of them) is actually sometimes referred to as a 'ringularity' as a result.
That was entertaining. Thank you Dr Becky.
I'm glad you chose this one with the black hole! At least that episode mentioned some 'real science' as well as making up imaginary science to fit the story. Some are so much more way out -like the one where various planets from all over the place all ended up together in a different universe or dimension - I don't remember the episode name. That was really weird!
Thousands of years into the future, I can believe they've made good radiation shielding
4:00 I think this is a case of "technobabble."
There was an episode of Star Trek where the Enterprise has to have "baryonic particles" removed from the hull of the ship. They said the process is deadly to living things (and such a sweep would defiantly be deadly) but harmless to inorganic matter which makes no sense as baryonic particles make up all matter, organic and inorganic alike. To remove them from the hull of a starship would be removing the hull of the starship.
Was going to also recommend you the Doctor Who episode World Enough And Time (Season 10 episode 11), which also deals with black hole physics in an interesting way, but it looks like half the comments are already suggesting it to you, haha.
I love how excited you get about the things that push your buttons. So, how about them short spaces of times? Is it a space or is it a time? Can we have a short spacetime interval? Thanks, Rebecca!
There was a great story with the main plot point being a black hole and its time dilating effects.
Would be nice if you could also talk about that one.
It was called "World enough and time".
I know I'm going off topic but my favorite episode is still the one with Vincent van Gogh. 👍🏻👀🇺🇲❤️
This and Blink!
Very good episode also. Between fiction and adventure, somehow episodes of it are very emotional. 'Listen' is a good episode also.
Oh, I love that one too!
Brilliant episode!
@@andyny29 becky or who. ?
Just a quick note on the self-gravity of space ships: we don't really in gravity to hold space ships together. We use nuts and bolts and welding.
First of all, this was BRILLIANT!
Now, will you do a continuation of it for the Satan Pit? Also, also, the Twelfth Doctor, the amazing Peter Capaldi, had a black hole two-parter too in his final series (10). It may not be as plot-centered as this one but it does have huge spaceship "orbiting" a black hole.
I have a question about the clip at 2:35 of the black hole Sagittarius A*. I have seen this a few times. What is the orbital period of the star that is highlighted? I have never seen this when I've seen the clip used. Might as well ask an expert.
I remember that in the 2nd episode of the reboot, they go see the earth consumed by the sun the far future
One that may not be on your radar at all is Starship Troopers. It had a lot of interesting items that did not exist at the time like an internet type interactive communications system and flat panel displays.
one of the aspects that is Again not shown here . . . is just how bright an acretion disc would look trough an opening like that . . . somekind of very strong light absorbtion would be required to be able to see anything at all
We would love you to react to more doctor who !
I seem to recall from watching many Doctor who episodes myself that the actual protection around the tardis is around the tardis the external so there is a area right outside the tardis the even if you were in deep space you could safely walk out still have air to breathe and be protected from all solar radiation even if you were right next to a star. I would assume that is what they are depending on protecting people when they open the hatch because the protection is a shield of some sort outside the actual tardis.
Thanks for the discussion on the difference between black holes and wormholes, as this has bugged me since being better introduced through the topic in Wrinkle in Time where Ms. Wassit explains wormholes as tesseracts (not completely right either there but the way it's described in the books especially for YA as I was at the time was a great way of understanding and setting me up for theories like those of Steven Hawking's on the subject later on.
Would love your thoughts on the book A Wrinkle in Time if you haven't already, Disney did make a movie of it but the physic was sorta Disney explained (the only issue I had with it as it was amazing) hence my comment.
Please, recommend a book, paper, or another source I can read about the distribution of matter from an exploding star. I am particularly interested to know if there is more matter or less near the center of the explosion and how the density and composition change with distance from the center.
Nice with a laugh before going to bed, Thank you, Becky👍🤣🤣🤣
Don't like the TARDIS engine noise????????? WHOT?????
That sound gives everyone who needs it, hope.
Another great video :) This one is right up your alley. Another decent Who episode with a black hole as the main impetus for the story, is "World Enough and Time", in Peter Capaldi's series 10.
15:02 "black holes are not holes!" but they are a 'whole' lot of mass :D
😄 good one!
Love the Dr Who style hand jive. 😁❤️
In the science fiction series Andromeda, the ship of that name, is in orbit around a blackhole, at the beginning of the series, and when it escapes the only surviving member of the crew, the captain, finds he is now three hundred years in the future.
David Tennant is back as the fourteenth Doctor.
if i am not mistaken , a geo stationary orbit , would simply mean that you are moving at the same visible speed as the accretion disc below you , which must be very close and very fast as you say , so that the inner orbiting material , is not moving any faster than you
Thanks for the video. Still a nice topic. Please see you next time.
Doctor Who is a great show. Doesn't matter if it's inaccurate because it's fun. I'd like to see you react to how they deal with a Time Paradox.
The human fighter in Babylon 5 was actually considered for use by NASA for a while. The human ships and the space station also have parts that rotate to simulate gravity. Great multi season story too.
Some form of gravity is necessary to sustain longer stays in space by humans. Of course Babylon 5 itself is one of the classic O'neil cylinders from the 60ies (and Babylon 4 as well, look at them at wikipedia). Infamously Gundam has them, and Interstellar shows one briefly at the end. A different proposal is the space wheel, proposed by von Braun and shown as such in Doctor Who and 2001 original from by Konstantin Tsiolkovsky in 1903.
@Dr_Becky That little rant in the Middle about Gravity reminded me of a Question i had for a long Time now: If you where to be placed in the exact Centerpoint of a large enough Body, would you be levitating? For example, if Humans go to the Moon, and we dig a Tunnel straight through it from Northpole to Southpole, would the Gravitational attraction of the all the Moons matter cancel eachother ou in a way that a Place with effectivly 0 G`s would be created?
LMFAO! Blackhole vs wormhole! THANK YOU! New sub. :D
There are ideas of 'negative mass' by the metaphor of 'energy debt mass', where the effective mass of an object can be concentrated in one place while being depleted in another, which wouldn't violate conservation of energy if it existed.
Disney popularized the concept of black hole as wormhole in the ending of its 1979 movie, The Black Hole. The novelization by Alan Dean Foster committed much less to that concept, sticking closer to the idea that the black hole is a gate to an afterlife of higher consciousness for the good guys, and a sort of hell for the bad guys. But they also got the idea that the Cygnus could be in a stable orbit, discounting being irradiated.
This reminds me of watching the The Princess and the Frog and I asked why the firefly was using a Zimmer frame in mid-air. My son (21 at the time) turned to me with this super serious expression and said "We don't question Disney!"😂😂
Looove your reactions! Can you do For All Mankind next? The show is insanely cool!
@Dr. Becky One thing that has always bothered me about the black hole images was that multiple teams built software to reconstruct the data into an image. The determination of what was considered more correct was the expected shapes based on predictions. This approach has bothered me since I learned about it because, to simplify the work done, we basically built software to produce the predicted image from the available data. The video I watched, I can't remember where I saw it, even suggested machine learning techniques may have been involved in the processing which furthers the idea that we trained the software system to produce the predicted image rather than producing an image from first principles and accepting whatever it produced. The method seems incredibly circular to me.
On the geostationary orbit bit, don't most black holes have a rotational period on the order of fractions of a second, since like you said, conservation of momentum from when they were stars, and they shrunk down the furthest they possibly could have (imagine the classic figure skater pulling her arms in and spinning faster). If they were in "geostationary orbit" when the period is that short, they'd have to be EXTREMELY close, right?
Thank you for your fun video
I requested that too! High five to Ian, we got Dr Becky hooked!
In one Matt Smith's and Jennifer Coleman's episode they explain the Tardis actually powered by a star locked at the point of collapsing into a black hole too create an infinite power source. I think it actually makes allot sense consider blackholes and their super gravity are one of the only real world phenomenons that can effect time.
There was a BBC documentary in like 2001 called "space" with Sam Neil which described black holes as "sucking everything in". Looking back at it now its very overdramatic and portrays the idea of a supermassive black hole in the milky way as "terrifying".
Not a film or TV show, but It would be really cool to see you play Outer Wilds. Not sure if you play games or not, but it's legitimately the best piece of science fiction I have experienced in any medium, and I feel like it's got enough stuff in there to keep an astrophysicist entertained (even if it's still far from accurate). It's not something that could be done in a single video, though.
This is what we’ve been waiting for!!! ❤ of course it is a show about a time traveler in a living phone box… so they had to have really good glass to block that radiation 😂 also, Dr. Becky should coin “Dark Stars”. That does explain them perfectly!
I hit like before I listened, I knew this was going to be good!
In Star Trek Next Generation a Romulan ship utilized a black hole for power.
I believe when matter is compressed it resists compression. Matter resists compression with an increase in its' internal pressure as its' temperature also rises.
I believe that just as when matter expands and it cools off, matter cools off as it inflates.
Stet? What? Yeah, that 'might' have been made up.
Thanks for the vid.
I remember cringing at this episode when it was broadcast for how ludicrous its misrepresentation of black holes was, and I was just a nerdy 15-year-old back then! My cringe almost breaks my face now, after having gained a Theoretical Physics degree and 17 years of additional life experience.
This is the kind of react content I can get behind
18:55 well good thing he's back as the lead Doctor for three episodes later this year
why is it an "accretion disk" and not an "accretion ball"? isn't material drawn in from all around the hole? or is this another gravity thing where the poles have less(?) gravitational pull than the equator?
Not a TV show, but a classic book. 📖
David Brin: "Earth"
About micro black holes, gravitation wave detectors, ...
Fiction, of course, but with rather solid roots in science.
incidentally theres another black hole episode in at the end of season 10 "world enough and time" that also deals with a black hole and its effects with time distortion on a very large colony ship
Doctor Who has many references to black holes, from classic who episodes "The Deadly Assassin" where Raselon has to quote the doctor
"That which balances all things, it can only be the nucleus of a black hole." "Raselon stabilised all the elements of a black hole and set them in an eternal dynamic equation against the mass of the planet" The blackhole supposedly captured within Galefrey itself referred to as the "Eye of Harmony"
The Doctor Who movie, where the Master uses the "Eye of Harmony" (Which is now somehow on the Tardis) to steal the doctors regenerations and give them to himself
And from Modern Who with the Matt Smith era "Journey to the Centre of the TARDIS" Where mutations are caused by the radiation from the black hole in the heart of the TARDIS
I think that the science of World Enough and Time was better. Missy's explanation of General Relativity wins.