Space Manufacturing, Gravity Tractor Experiment, Digital Adaptive Optics | Q&A 274

[@mysterycrumble]

'like your dreams... those stars are still alive' - love it!

[@seionne85]

Nobody is falling asleep to you fraser!! You bring the energy lol thanks man ❤

[@caleyjag2]

Actually it's my 3 year old daughters favorite show to fall to sleep to. She thinks Fraser is my friend 😂

[@universemaps]

It keeps me awake during my three-hour drives every Monday and Thursday. It was easy to listen to a couple of long Q&As, but from now on, they will have to be 5 or 6 short ones...

[@ocoro174]

I am 🥰

[@jblacktube]

Funny you should mention that. I often fall asleep while watching youtube and I always end up waking up to Anton Petrov. It's interesting, it's relaxing, and it's easy to drift back off to sleep. I bet a substantial amount of his income comes from the unconscious. =)

[@thomasmcdevitt1600]

such a backhanded compliment

[@osmia]

I'm glad someone asked that question about seeing the milky way. I'd never even thought about it and following your explanation made me think

[@bjornfeuerbacher5514]

One should add that we actually see only a _tiny_ part of the Milky Way with our naked eye. Most stars which we can see are at most some 100 light years away, whereas the Milky Way is at least 100 000 light years across.

[@adamtschupp9825]

already missing the longer episode format

[@ianmatthews7385]

Exactly... Where was the vote?!?!?

[@kargi42]

Technically Iceland is just "below" the Artic Circle. Only their little island called Grimsey touches or is "above" the Artic Circle.

[@AlaskaBrian]

As someone who lives in Alaska and is an aurora photographer, I can definitively tell you that going near the winter solstice is not necessary. Fall and spring are great times to see the northern lights. Sure it's not dark for as long, but not as cold, and that makes up for the difference. Also, due to the Russell-McPherron effect, the magnetic fields of earth and the sun align in a way that is more favorable to the aurora around the equinoxes.

[@Daz050571]

Isn't a black hole mass, spin and charge?

[@frasercain]

Yeah, verbal typo.

[@icaleinns6233]

Really liking the shorter format. Thanks!

[@emanuelwinterfors6189]

Thanks for a great answer to my question! I suspect the main reasons why software-based "undistorting" of high frame rate astronomical images is not used much is mainly due to 1) the much poorer photon-collecting properties of high frame rate cameras compared to the image detectors (still CCDs?) used in big telescopes 2) the need to still use a laser for reference if your object is faint 3) the massive data storage and processing requirements

[@Tanks_In_Space]

Great idea to shorten these; now I'm going to watch them as well.

[@realzachfluke1]

Ok but you have to admit you were missing out before, then you're allowed to enjoy them lol.

[@Scynthius137]

I like the new short format.

[@justfellover]

What part of the Milky Way can we see? Best question in months. Gonna check out your answer now. Edit: Better question: What part of the Milky Way are our naked eye stars located in?

[@frasercain]

A sphere about 400 light years around us

[@johnbrimmer9403]

I thought that bright line of stars that everyone says is the "Milky Way" is actually the Sagittarius Dwarf galaxy... Cuz the geometry is wrong if the solar system is in line with the disk of the Milky Way. The line of stars goes north to south .... So we are a part of both galaxys. Astronomy is so awesome. I love your channel man. Keep it up!

[@frasercain]

Nope, that's the Milky Way. The only dwarf galaxies you can see with your eyes are the Large and Small Magellanic Clouds, and only from the southern hemisphere.

[@aurtisanminer2827]

The person going to Alaska should go to Fairbanks in the middle of winter. Some of the best lights I ever saw were from there and you’re still in civilization. Just go a little ways out of town to avoid light pollution.

[@Anonymous-m9f9j]

I love so much Anna sitting there at the end vibing then she gets the shoutout and snaps around out of the afterglow 😂

[@johnbrimmer9403]

Happy your subscriptions have increased so much since the last time i hopped on your channel! Great job!

[@phoule76]

One does not simply ask 'why don't they just?'.

[@coulie27]

Love the bite sized question show

[@Infected.]

I need to queue a couple of these while im trying to sleep haha,smetimes I get that enthralled i cant fall asleep 😂

[@DrNappers]

A minor quibble about the word "insignificant"... in this case, I'd say that the amount of gravity provided by the spacecraft is in fact quite significant (since that's the whole point of the gravity tractor), just minuscule.

[@goyya888]

I think a whiteboard or whiteboard like tech could help you with your answers. You talk with your hands a lot, mostly to illustrate a point. Thinking of the Milkyway question in this one.

[@Thomas-gk42]

Huge thanks, very interesting

[@BrandonGraham]

Too short, I'm not asleep yet! 😉

[@GrubyGrzyb]

Question: (Hope I can ask if I'm not subscribed) Suppose we put an air atmosphere on Mars. To breathe, the air must be at the right pressure. The gravity on Mars is weaker than on Earth, so the atmospheric pressure will be lower. So will it be possible to breathe on Mars? In general: What is the minimum mass of a planet, that would make breathing possible? (Sorry for bad English. Still learning.)

[@frasercain]

It's not the mass of the planet, it's the amount of the atmosphere. So, you just need enough air and it would be breathable.

Question: Hey, Fraser! Have you read book 5 in the Bobiverse series? What do you think of this explanation for the Fermi paradox?

[@ioresult]

3 numbers for a black hole: mass, spin and electric charge.

[@floydbertagnolli944]

Thank you. You always teach us a lot! 😎

[@jordibuchner]

I like how the thumbnail has a 'you are here' circle while the sun is marked on said map xD

[@bjornfeuerbacher5514]

Sheldon from "The Big Bang Theory" had a T-shirt with an image like that.

[@TeamAgainstWild]

Again thanks for an interesting and very welcome video

[@zenithperigee7442]

@Fraser Cain, enjoyed the video content! I hope you and your Family/Friends have a Happy Thanksgiving!🦃

[@ElitePhotobox]

7min The software method is called Lucky Imaging and is used in Astronomy not easy on Jupiter as it rotates to fast !

[@astrolad293]

A variation, Speckle Interferometry, is used to resolve close double stars.

[@scottdorfler2551]

When are we getting Scott, Marcus, Fraser IFT6?!?!?

[@sunny_ua]

Damn, this wasn't long enough for me to fall asleep to 😔

[@frasercain]

All right, we'll keep tinkering until we get exactly the right length to fall asleep without actually missing anything.

[@sunny_ua]

@frasercain Hehe thank you! I appreciate it.

[@dougyaroch3380]

Great show thanks

[@wolpumba4099]

*Space Manufacturing, Gravity Tractor Experiment, and Digital Adaptive Optics: A Q&A with Fraser Cain* * *0:37** Which part of the Milky Way can we see?* We see different parts of the Milky Way throughout the year due to Earth's orbit. In summer in the northern hemisphere, we see towards the core. Other times, we see the disc from different angles or even out into intergalactic space. * *2:41** Will space stations be economically viable?* Zero-gravity facilities in orbit could enable manufacturing of products like optically pure fiber optic cables. However, the high costs of building and operating such facilities currently limit their economic viability. * *3:13** Freefall in Orbit vs. Deep Space:* While being in freefall around Earth feels similar to drifting in deep space, subtle gravitational influences from other celestial bodies become relevant for highly sensitive experiments. * *5:50** Are there different types of black holes?* Black holes are primarily characterized by their mass and spin. Different "types" simply refer to varying masses, from stellar-mass to supermassive. * *6:58** Can you un-distort images instead of using adaptive optics?* While astrophotographers use software to "un-distort" planetary images taken with short exposures, this isn't feasible for deep-sky objects requiring long exposures due to their faintness and the limitations of current telescope technology. * *11:53** How do we know that far away objects are still there?* The light we see from objects like planets resolved by JWST, within a few hundred to a couple of thousand light-years away, is only a few hundred to a couple of thousand years old. Considering planets can exist for billions of years, it's highly probable they're still there. * *13:12** Does NASA have plans for a gravity tractor experiment?* There are no immediate plans for a dedicated gravity tractor experiment. However, the OSIRIS-REx mission, repurposed to rendezvous with Apophis, will provide valuable data on asteroid movement and gravitational interactions, potentially informing future asteroid deflection strategies. * *15:58** Best time to watch auroras in Alaska?* While solar maximum, currently underway, brings more frequent auroras, the next year should still offer good viewing opportunities. The key is maximizing darkness, making mid-winter near the solstice the ideal time to visit Alaska for aurora viewing. * *18:11** How does light from far away get to us?* Each photon we see, whether from a nearby star or the cosmic microwave background, has traveled unimpeded from its source to our detectors, sometimes over billions of years. While some photons are lost or distorted along the way, a significant number complete the journey, allowing us to observe the universe. I used gemini-1.5-pro-exp-0827 on rocketrecap dot com to summarize the transcript. Cost (if I didn't use the free tier): $0.03 Input tokens: 21431 Output tokens: 588

[@keshavbhanu5788]

👍 thanks

[@Ralinos]

3:45 from here, you abandon the previous thread for a space engineering tack. (Not opposed, but clarification is necessary) What you were previously describing is akin to SCUBA. In that neutralizing buoyancy can remedy many effects of distance from specific bodies, etc..

[@logiticalresponse9574]

Question. If you could stop all of your velocity in space relative to the solar system would the gravitational pull be strong enough to keep you "in orbit" , totally leave you behind or would you fall straight into the sun or earth from the iss ? As if you were on a space walk and you magically lost all your velocity

[@realzachfluke1]

You'd fall into the sun.

[@bjornfeuerbacher5514]

What do you mean with "relative to the solar system"? Do you mean "relative to the sun"?

[@VentureLC86]

this channel is for space passion (insert romance plot here) not sleeping.

[@1nFect3d1]

curious what the milky way or other galaxies/points of interest would look like from mars or other planets

[@JohnMuz1]

🎉Thnx 🎉

[@markmelcon9484]

Gravity is not the tractor, it is the hitch.

[@jack504]

Is energy conserved on cosmic scales? The expansion of the universe means that light is redshifted in all directions.

[@bjornfeuerbacher5514]

The Usenet physics FAQ has a great answer on that... it starts with "depends on what you mean with 'energy', and what you mean with 'conserved'". ;-)

[@NeonVisual]

Wen hyper massive black hole?

[@ianmatthews7385]

I prefer the old format tbh... I don't remember seeing a vote to split the question show... 😢

[@frasercain]

It just comes in two episodes instead of 1. We're seeing that many more people like to watch the shorter versions.

[@PrincessTS01]

a second suggestion is a fleet of starships set to send out millions of people in exodus from earth to colonize the galaxy in generation ships each the size of small towns

[@Mr76Pontiac]

I was going to say "Send the lawyers!" but then I got to thinking "I don't think I'd want to visit a planet full of lawyers...."

[@uncleeric3317]

Fraser, what is the size/shape/dimension of the Lagrange points?

[@frasercain]

They're blobs caused by all the interacting gravity fields. They change from moment to moment as the planets orbit the Sun.

[@scoty_does]

How do we really know what our galaxy looks like. Is it possible we are wrong and it shaped different than we think, because of our point of view?

[@arnelilleseter4755]

We know for certain that it is a spiral galaxy. But there are details we don't know, like exactly how many spiral arms there are.

[@leahdiston827]

Could we build a Nimitz size spaceship using the materials on the moon?

[@marcmaillet3044]

How did space come to being or how did this void/space exist?

[@PrincessTS01]

one thing we can make in orbit that we cant make on earth is a space station the size of a city floating above the clouds

[@MonCappy]

I don't like the shorter length of these episodes. ;_;

[@ianmatthews7385]

Agreed, the original length was fine!

[@shadowfax743]

I have a question that would be very interesting to get your thaughts on the range that the first radio waves mankind made into space.

[@MaxBrix]

Here is an answer you get no punctuation radio was invented a bit more than a hundred years ago radio waves travel at one light year per year it has gone a bit more than a hundred light years

[@realzachfluke1]

The passive aggression on display here is truly sublime.

[@shadowfax743]

@MaxBrix I'm just asking about a visualization not a dick response I know it's 100+ year or more.

[@booradley4237]

The last question could've just been answered with "space is big"

[@SK_2521]

Question: is there a plan for Solar System wide internet? Something more capable than DSN. So it can handle both local networks (Moon, Mars?) and communication between planets

[@user-pf5xq3lq8i]

There will be lag when playing Half Life 3 with a dude on another planet.

[@SK_2521]

@@user-pf5xq3lq8i Or we'll have a postal spaceships with SSDs moving big files between planets - same as data for the Black Hole picture has been moved from Antarctica. That's why I'm curious if there are any designs

[@realzachfluke1]

Of course not. Not yet. Baby steps!

[@marcekessen8003]

Fourth! (May it be with you)

[@JamesCairney]

Where'd the voting go?

[@JeffTheisen]

Wouldn't it be ironic if Osiris accidentally affected Apothes' orbit in such a way that it directed it right into Earth?

[@bbartky]

There’s a 0% chance of that happening. Osiris is tiny compared to the asteroid Apophis. It’s just going into orbit, unlike the DART mission that hit its target at a vert high relative velocity. Think of it this way. It there’s a freight train heading directly towards you throwing a pebble at it won’t slow it down or change its direction.

[@JeffTheisen]

@@bbartky Well, it was meant to be a joke but I'm never as funny as I think I am.

[@scottymoondogjakubin4766]

Hard to fathom we here on earth my never know what our galaxy really looks like or whats hiding on the other side of the galactic bulge !

[@joshadams8761]

I was going to mention electrical charge, but I see that another commenter just.

[@911review]

Fraser, if an asteroid came from behind the sun, would we have time to send a rocket to hit it, and would we be able to use a starship to destroy it ? aren't they over 100 tons?

[@arnelilleseter4755]

If it is detected early we might have a month or two. Whether or not Starship could destroy it or not depends on the size of the asteroid. If we are talking about an asteroid like the one that killed of the dinosaurs, not a chance. That was more than a trillion tons.

[@benspiers6147]

Hi there Fraser and fans, I was wondering if WASP-12b, given that it’s currently on a death spiral, what’s going to happen to all the wasps?

[@hive_indicator318]

They're getting moved to a nice planet upstate

[@MrPerfs]

night frasier see you around

[@muddygun]

I started looking for someone who may have taken a picture of the Milky Way for 365 days and made a Timelapse out of it, but I can't find one. maybe you know of one??

[@greggweber9967]

Will one of your descendants manage Universe Today on Babylon 5? LoL

[@As3th8r]

I am clueless. Where can i find the livestreams?

[@frasercain]

We set them as private here on KZbin, but you can access them free on our Patreon: www.patreon.com/posts/space-gravity-q-116788754

[@Raz.C]

Drug manufacturing in space? If you're talking about meth, or heroin, then MAYBE. But if you're talking about pharmaceuticals, then I'm afraid that gravity doesn't have any significant effect on the interaction of molecules and so I can't envisage any realistic scenario where making medicines in microgravity is meaningful.

[@curlyrooster118]

outward force...centrical force

[@frasercain]

Centripetal

[@Xostrich12X]

First

[@frasercain]

You win!

[@deltalima6703]

"Canada doesnt get that cold..." Only a canadian would say that. Everyone else can freeze to death in canada 11 months out of the year, 🤣 🤣

[@frasercain]

But we're the California of Canada

[@hive_indicator318]

He's in the Miami of Canada