The light pollution facts are so depressing, and being an American (and not one of the lucky ones), I have *never* seen the Milky Way with my own eyes, even though I'm an amateur astronomer. And the thing is, I'm almost 25 now, and a true dark sky has never been available to me-but I'm a person who's at least _aware_ of what I'm missing because of my science-minded path in life. And as Fraser mentioned, 80% of all Americans can't see our own galaxy in their sky, so what troubles me more than literally anything else is thinking about _just how many_ millions and millions of people here, ESPECIALLY young people, don't even have a basic sense of what they're missing. That only adds to the dread this story gives me because it's like, if you don't know there's a problem, and you never hear that something is being _progressively, and _not even gradually_ taken away from you (none of the most consumed media in America is going to tell anyone, I can 100% promise you that), how can you possibly stop it? All I know though, as someone who does understand the night sky's overwhelming importance to humanity, and the part it played and continues to play in the development of human beings, is that I damn well need to get involved. Period. Thanks, Fraser.
I grew up in a small town in Alaska where there is no light pollution to block the views. Now I live in a small city about 80 miles away. Every time I go back home to recreate I’m blown away by how much more visible the stars and milky way are there.
I agree that it is depressing, but, at least in cities, it is a somewhat complex problem. Lighting at night in cities helps keep people safe from crime and drivers more aware of their surroundings. Whatever solution is proposed to this problem needs to take these factors into account.
@@sciencecompliance235 Well, like Fraser said, its not that hard, point it at where its needed, and not just everywhere. Look at all the lighting on buildings that just goes everywhere, or the spotlights that are pointed upwards towards buildings, or just directly into the sky. The lights that are pointed at the ground like streetlights are the smallest problem.
I'm old enough to remember DSCH when I was a kid...Dark Skies for Comet Halley. Fred was saying these things decades ago...could we please just use lights only when we need them, and shine them only where they are needed?
@@GamingXperience That's not exactly true, though. The lights pointed toward the ground reflect off the ground and illuminate the atmosphere. Also, some amount of lights are needed on buildings for aircraft, and I don't see how you can mandate the removal of all decorative lighting.
Wow !!!!!! I am super stoked that finally, FINALLY ! NASA are going to test a nuclear thermal rocket ! this is so long over due, but it is the start of serious propulsion systems, and it will, undoubtedly, impress us all and of course demonstrate that our solar system is within reach in months and not years ! I can't wait to see this thing go !
There’s no space between the last word and punctuation, exclamation mark(s)/point(s), question mark(s) etc, so on, and so forth. Like after your wow it should be Wow!!!. Or after your finally it should be FINALLY! No extra space. Same goes for something like the comma it should be directly followed without the superfluous space after the word before the ,. Just thought I’d mention it as I know I would’ve appreciated being corrected if it were me using those characters wrong. ✌️🖖
Light pollution here in the UK is 25% lower at the moment because nobody can afford the bloody electricity prices on average £400 converted into $500 per month . Another splendid video, thank you Mr Cain.
on the up side.. that painful increase os a direct body blow to Russia and Putin. I didnt think the nato allies elites would allow it but we have all sacrificed to stop Putin and help The Ukraine, without shedding our kids blood.
Here on Earth we have been cultivating plants for hundreds of years to make cements... such as linseed oil. It's a binder for oil paints. Lots of fatty bonds in linseed oil, it does not surprise me to learn we are trying to make fungi or other plants that can make bonding materials as a cement.
I'll selfishly predict StarShip launch in July, AFTER I retire at the end of June when I can camp in Boca Chica for weeks if need be. I saw the first Falcon Heavy launch and would love to be there for the maiden voyage of the next big thing. 😃😃
I actually had a meteor fly-by experience in 1965 in NJ. It was midday and this meteor was cruising through the atmosphere at the same speed as a commercial jet at 35,000ft. It was difficult to estimate the altitude due to its size....HUGE, glowing red with mini crater pockets and pieces falling off as it flew by.
You've been predicting March since at *least* last November. ≥5 times you've said that I believe Totally agree with you! (and have for a while) 😄 Absolutely *Love* your content; thank you!!
I miss the good ole days of being able to see the Milky Way. I used to go camping for a week at a time in Henderson TX. I remember waking up at various times during the night and seeing that the Milky Way had moved. It got to where I always knew what time it was at night just from where the stars were. If I win the lottery tonight, I'm going to buy or build a home in the middle of nowhere so I can shoot my bow and look at the stars. You're welcome to come out, have s'mores, and look through my enormous telescope!
As I recall; the first launch was to be Starship splashing down east of Hawaii and possibly an attempt to catch the booster. Has that changed to full orbital and / or an attempt to catch Starship too ? BTW, I've watched enough to feel a bit out of exchange and have subscribed via Patreon. On the Moon.
Actually, both craft will come down in water, they do not want to risk losing the launch tower on the first event. Each craft will execute its landing sequence as if it were landing at LZ0 to test the landing sequence.
For example with the light pollution part of the video.. here in Las Vegas we have the Luxor, which is the pyramid building on the strip pointing an incredibly bright beam into space for no reason. Light pollution is a MAJOR problem in Vegas and the stupid Luxor makes it even worse. No reason for it whatsoever. We should be trying to get the casino to remove it.
I'd be curious to know how much the Luxor light contributes overall to LV's problem. It might be more (politically) efficient to alter/reduce streetlights instead. Maybe eventually add some sort of exciting earthfacing mirror above it. A fancy one. Might even look more spectacular.
@Fraser Cain You should just start a consolation company giving advice on Public Launch dates at this point. SpaceX and NASA can pay a small fee for you to inform them when they will actually launch their products.
I'm lucky to live in a fairly dark place; I just need to disperse the clouds... Edit: I try to enjoy the sky here in Cornwall whenever I can, especially if city dwelling friends come visiting. Provided that it's not raining.
Ay leave a like for my man who did his damnedest to give us all this super specific space info in easy-to-consume bite sized pieces. Cheers🍺to the space man who uses my vocabulary
I so look forward to and enjoy this channel! Light pollution, understand the need for a certain amount of light needed at night but just how much wasted energy is being consumed for aesthetics? Dark skies with cosmic light sets the mood for me not neon😊
The last segment on light pollution and LEDs is an example of Jevons Paradox, where an increase in efficiency should lead to less energy usage, but instead the energy savings create an increase in demand. This phenomenon is one reason why I and others have concerns about humanity gaining access to a cheap, abundant source of energy.
I'm assuming that the RTG design improvement is in components other than the source? I can't imagine there being much room for improvement of the source's size since it is already a dense chunk of material and its casing is meant to survive re-entry without burning up or breaking. That would mean that the bulk of the newly designed RTG is going to be the source with the remainder being impressively miniaturized.
Using another power conversion method. Also, 1/1000th the size and 10 times more efficient means 1/100th the power. So, like 1-3 W, fitting for a cubesat.
A reactor is just a lump of uranium until it is started, it's only after it is started you get the nasty daughter products. Which is why they plan to start it in orbit where it won't reenter for 300 years.
I live under a 141,800 square acre no fly zone and I can see; The Great Rift, Polaris, (without a pair of binoculars), and all the planets that can be seen with the naked eye. I own an 8" Newtonion reflector telescope, however I can just walk outside and see quite a lot. I live on 4 acres next to, "The Wichita Mountains National Wildlife Refuge," and "Fort Sill milatary base," (Oklahoma) Which is the largest field Artillery range in the world. That is why there is no light pollution here, except for Lawton, Chickasha, and Duncan, which have a small glow on the horizon. Even when I lived in the Rocky Mountains, in Durango, CO. there was too much light, unless I drove two hours away from Durango. Durango was not a no fly zone either, so planes were everywhere!!! Brother James Kendall Moore OSB OFS OSC
Seems like a lot of money spent to use orion to get to the moon, then transfer to starship to land and get back into orbit then transfer to orion. Hopefully what it really means is that orions days are up and starship will do it all.
Last night the differential and integral really struck: We "are" somewhere, we can "see" velocity, we can "feel" acceleration and "experience" the change in acceleration. To know about acceleration you need to experience, to know about speed you have to feel and to know about position you have to see. Then why do we have to be?
Hi Fraser! Would a nuclear pulse rocket, such as project Orion, feel like someone kicking the back of your chair (or worse!) however often it fired, or am I thinking about the physics wrong? I imagine a bulllride rather than smooth sailing through space. Is there anything out there that would tell us what that ride would be like, had they figured it out?
per the creators and scientists of orion it was NEVER serious for obvipus reasons (the idea is insane). They wanted to do other research but took a shot at this as they knew the vested interests would eat the idea up.
Last night I cast a suspicious eye out for any green comets that may be harassing us, and I could see about 5 stars. Where I am, 🇮🇪 the problem isn't so much light pollution as humidity. And if there's any publicised astronomical goings-on, you can bet your arse it's gonna be cloudy.
Thermal couple, thermionic converter, ?, ??. What are their differences in the devices for converting heat to electricity? How does each type operate and what are their ranges of operation? In the operation of a nuclear rocket, how could these devices be arranged, mixed along the exhaust to generate electricity without compromising thrust?
I am sorry that the equipment inside Of JWST failing so soon. I was in hopes that Scientists and Engineers would have built more robust equipment. It really makes me appreciate the Scientists and Engineers who built Voyager 1 & 2 and Hubble.
Hubvle was broken before it was ever launched... The curve of the mirror was wrong and somehow noone bothered to check that the sincle most important piece of hubble wasnt built correctly. They had to send up a corrective lens. A man developed a fix and offered it to nasa. They ignored him and paid a contractor $$$$$ to do it.. .nasa at least at the time was an incompetant top heavy beauracracy
The potential for nuclear thrust systems is huge, and only thing that has prevented them being commonplace is irrational fear. Nuclear powered UV/IR laser ablation plasma drives seem like a better option than hydrogen propellant.
"tractor" - my mind goes to a different kind of tractor, I grew up on a farm. 15 seconds later... ooh, it is the same word after all. I had never thought about the etymology of the word "tractor" before.
In the square mile I live in; There are 10 people, 5 houses, and 4 outside security lights. I can walk to my mailbox at night, and I cannot see my hand in front of my face!!! A VU meter, set on my table in my bedroom will read 3DB which is equivalent to a mosquito!!! The house is cement block, brick veneer and stucco.
I have been wondering about this for some time now why does Nasa not equip the landers and rovers etc which use utilises solar panels with a simple broom or duster? I mean isn't it better to risk scratching the solar panels insignificantly rather than cancelling the mission?
I was watching the movie 'Gravity' and thinking about it I'm surprised SpaceX haven't mentioned what they'd do if space junk/debris impacted Starship. Starship is a huge ship that would probably get impacted at least once by an orbiting piece of crap that six decades of littering in space have accrued.
Gravity was a terribly unscientific movie. It could even get a sense of scale right in a Kessler Syndrome scenario. Don't worry about it, Starship will be perfectly fine.
We had a green pump laser in a setup that delivered about 10W. So it was not really strong. One day I noticed a dust particle had been caught in a laser focus. It was very small and only visible because it scattered this intense laser light. This dust particle stayed caught in the focus for about 1.5 days.
You could market 10W lasers as vacuum cleaners and be a door to door salesman. I, for one, might actually buy something from a door to door literally danger laser salesman
Thanks for all the news, Fraser! 😊 You know, during college I developed a game in Java and OpenGL where you controlled a flying saucer and had to abduct civilians... It was fun! 😂 Anyway, stay safe there with your family! 🖖😊
Someone should tell the big child to put some masive cone below the engines in order to deflect the blast wave sideways. Such a blast wave reflecting straight back to the engines is very very stupid...
I love listing to this when I go to sleep. But I have a question. Suppose the ISS adds a module that's a big room, a sphere for arguments sake, and you somehow found yourself in the very middle of the room with zero velocity in any direction. The walls are let's say 5m away from you in each direction. In this scenario, could you swim through he air and actually escape or would you be stuck in the middle since every action you make has an opposite reaction. Would this be any different if you were floating outside in the middle space, if you could not eject material, would you just be forever stuck in the same spot/orbit? Thoughts?
Nuclear thermal rocket needs big heat radiators to keep your craft from melting. So cover these in solar cells and delete the nuclear reactor to save weight.
People have always been comfortable taking nuclear to space and off the planet 🌎 the narrative is skewed because of space nuclear treaties otherwise nuclear space propulsion is a misnomer for space based weapons
7:58 yet again discovered too late todo nothing! good thing it was not fly by 70km and crash. 3000km still needle. still that one that will hit and allready collision course we havent spot yet. is that scary?
I hate to put a downer on things as this has been nagging me for too long...but doesn't SpaceX seriously need to show Starship successfully landing more than once???
@Tom's Cubes & Games Yeah I'm not sure what goes into making somthing human rated but I would hope they had a successful landing streak of 10+ on earth and maybe two landings on the moon before trying to land on the moon with people. Then again I doubt they did that for the original moon landings, so.. spooky.
North Korea isn't polluting the night sky, but seriously. we should consider developing best practices for exterior lighting. Otherwise we'll get mandates
Just watching a question show from feb 11, 2022 and it made me wonder if you think Hubble will be replaced. Would it not benefit us to have another newer version up there?
"Significantly, the lighting has been found to disrupt insects' reproduction. Researchers believe street lights deter nocturnal moths from laying their eggs and put insects at risk of being found and eaten by predators, such as bats.n26 Aug 2021". Light pollution is a big problem for the animal world as well.
Since Webb keeps messing up the establishment theories, I think there are very good reasons why Webb keeps having problems... the findings will cost the scientists lots of funding.
Ps. that asteroid that passed Earth, not concerned about atmosphere, but rather the movie gravity. One cascading explosion of satellites. We'd go dark world wide.
You don't have to worry about gravitational waves, they're stupendously weaj. We'd be shot out of the Solar System by an astronomically unlucky passby of a black hole before we'd have to worry about that.
Carbon dioxide is denser than air so it sinks down and resists being blown off into space, but all the water was broken up and the light hydrogen was stripped away. Venus is bone dry.
That seems like an obvious thing that should be regulated. Night lighting is unfortunately necessary for certain reasons, though, so it's not going away completely anytime soon. I'm hoping that tools like AI and advanced, ubiquitous sensors can help reduce the amount lighting used only to that which is necessary. I do think regulations (that are actually enforced) will be necessary, too, unfortunately.
Hey I have a question for you what would your reaction if we found aliens or they found us and made contact with us? Don’t bother with the name I don’t know how to pronounce it
The light pollution facts are so depressing, and being an American (and not one of the lucky ones), I have *never* seen the Milky Way with my own eyes, even though I'm an amateur astronomer.
And the thing is, I'm almost 25 now, and a true dark sky has never been available to me-but I'm a person who's at least _aware_ of what I'm missing because of my science-minded path in life. And as Fraser mentioned, 80% of all Americans can't see our own galaxy in their sky, so what troubles me more than literally anything else is thinking about _just how many_ millions and millions of people here, ESPECIALLY young people, don't even have a basic sense of what they're missing.
That only adds to the dread this story gives me because it's like, if you don't know there's a problem, and you never hear that something is being _progressively, and _not even gradually_ taken away from you (none of the most consumed media in America is going to tell anyone, I can 100% promise you that), how can you possibly stop it?
All I know though, as someone who does understand the night sky's overwhelming importance to humanity, and the part it played and continues to play in the development of human beings, is that I damn well need to get involved. Period.
Thanks, Fraser.
I grew up in a small town in Alaska where there is no light pollution to block the views. Now I live in a small city about 80 miles away. Every time I go back home to recreate I’m blown away by how much more visible the stars and milky way are there.
I agree that it is depressing, but, at least in cities, it is a somewhat complex problem. Lighting at night in cities helps keep people safe from crime and drivers more aware of their surroundings. Whatever solution is proposed to this problem needs to take these factors into account.
@@sciencecompliance235 Well, like Fraser said, its not that hard, point it at where its needed, and not just everywhere.
Look at all the lighting on buildings that just goes everywhere, or the spotlights that are pointed upwards towards buildings, or just directly into the sky.
The lights that are pointed at the ground like streetlights are the smallest problem.
I'm old enough to remember DSCH when I was a kid...Dark Skies for Comet Halley. Fred was saying these things decades ago...could we please just use lights only when we need them, and shine them only where they are needed?
@@GamingXperience That's not exactly true, though. The lights pointed toward the ground reflect off the ground and illuminate the atmosphere. Also, some amount of lights are needed on buildings for aircraft, and I don't see how you can mandate the removal of all decorative lighting.
Wow !!!!!! I am super stoked that finally, FINALLY ! NASA are going to test a nuclear thermal rocket ! this is so long over due, but it is the start of serious propulsion systems, and it will, undoubtedly, impress us all and of course demonstrate that our solar system is within reach in months and not years ! I can't wait to see this thing go !
There’s no space between the last word and punctuation, exclamation mark(s)/point(s), question mark(s) etc, so on, and so forth.
Like after your wow it should be Wow!!!. Or after your finally it should be FINALLY! No extra space. Same goes for something like the comma it should be directly followed without the superfluous space after the word before the ,.
Just thought I’d mention it as I know I would’ve appreciated being corrected if it were me using those characters wrong. ✌️🖖
@@-MaXuS- It's avant-garde, just like your use of 'wrong' once was
You've drunk all... all that kool-aid my friend, best wishes coming back to reality. They're playing you like a fiddle, perhaps a flute.. I smh.
its piffle
@@Roboticdoughbull3k 🤔 I mean false info? I'm curious sorry
Gotta admit, the silly UFO picking up the cows animation got me. Especially when it came back and dumped them all back out lol
Light pollution here in the UK is 25% lower at the moment because nobody can afford the bloody electricity prices on average £400 converted into $500 per month . Another splendid video, thank you Mr Cain.
I say thats a good thing ! Light doesn't prevent crime anyway ! there should be an organization to address the matter !
Well unfortunately to us mere citizens there isn't much we can do.
on the up side.. that painful increase os a direct body blow to Russia and Putin. I didnt think the nato allies elites would allow it but we have all sacrificed to stop Putin and help The Ukraine, without shedding our kids blood.
Since that instrument was made in Canada they have to use Canadian commands. Probably something as simple as saying "Eh" after the command.
The UFO dumping the cows - LOL!
Here on Earth we have been cultivating plants for hundreds of years to make cements... such as linseed oil. It's a binder for oil paints. Lots of fatty bonds in linseed oil, it does not surprise me to learn we are trying to make fungi or other plants that can make bonding materials as a cement.
I remember seeing a night sky full of stars growing up. Looking up at the night sky now saddens me.
I'll selfishly predict StarShip launch in July, AFTER I retire at the end of June when I can camp in Boca Chica for weeks if need be. I saw the first Falcon Heavy launch and would love to be there for the maiden voyage of the next big thing. 😃😃
Great episode, lots of stuff I hadn't heard about yet. Thanks!
Such great work and sharing it with the world Fraser. Sent a donation. Keep it up.
I actually had a meteor fly-by experience in 1965 in NJ. It was midday and this meteor was cruising through the atmosphere at the same speed as a commercial jet at 35,000ft. It was difficult to estimate the altitude due to its size....HUGE, glowing red with mini crater pockets and pieces falling off as it flew by.
You've been predicting March since at *least* last November. ≥5 times you've said that I believe
Totally agree with you! (and have for a while) 😄
Absolutely *Love* your content; thank you!!
Just hope jwst will live a long time...
I miss the good ole days of being able to see the Milky Way. I used to go camping for a week at a time in Henderson TX. I remember waking up at various times during the night and seeing that the Milky Way had moved. It got to where I always knew what time it was at night just from where the stars were. If I win the lottery tonight, I'm going to buy or build a home in the middle of nowhere so I can shoot my bow and look at the stars. You're welcome to come out, have s'mores, and look through my enormous telescope!
I was over thirty when I first saw the Milky Way. I didn't live anywhere particularly urban, but to your point... It's everywhere.
Growing building and material that can fix itself cool.
As I recall; the first launch was to be Starship splashing down east of Hawaii and possibly an attempt to catch the booster. Has that changed to full orbital and / or an attempt to catch Starship too ? BTW, I've watched enough to feel a bit out of exchange and have subscribed via Patreon. On the Moon.
Actually, both craft will come down in water, they do not want to risk losing the launch tower on the first event. Each craft will execute its landing sequence as if it were landing at LZ0 to test the landing sequence.
For example with the light pollution part of the video.. here in Las Vegas we have the Luxor, which is the pyramid building on the strip pointing an incredibly bright beam into space for no reason. Light pollution is a MAJOR problem in Vegas and the stupid Luxor makes it even worse. No reason for it whatsoever. We should be trying to get the casino to remove it.
Or tell them to use a sodium line laser to make an artificial star for use with adaptive optic telescopes
(I'm only half kidding)
I'd be curious to know how much the Luxor light contributes overall to LV's problem. It might be more (politically) efficient to alter/reduce streetlights instead.
Maybe eventually add some sort of exciting earthfacing mirror above it. A fancy one. Might even look more spectacular.
Its a city my guy light pollution is innevitable just dont live in a city, theyre shitholes anyway, especially vegas.
@Fraser Cain You should just start a consolation company giving advice on Public Launch dates at this point. SpaceX and NASA can pay a small fee for you to inform them when they will actually launch their products.
I'm lucky to live in a fairly dark place; I just need to disperse the clouds...
Edit: I try to enjoy the sky here in Cornwall whenever I can, especially if city dwelling friends come visiting. Provided that it's not raining.
Wow, several RTG's could still be smaller than one older style RTG... we could now make a satalite that does MORE, and has MORE and still is smaller!
Oh, Love your channel. Great info. 👍
Ay leave a like for my man who did his damnedest to give us all this super specific space info in easy-to-consume bite sized pieces. Cheers🍺to the space man who uses my vocabulary
I so look forward to and enjoy this channel! Light pollution, understand the need for a certain amount of light needed at night but just how much wasted energy is being consumed for aesthetics? Dark skies with cosmic light sets the mood for me not neon😊
The last segment on light pollution and LEDs is an example of Jevons Paradox, where an increase in efficiency should lead to less energy usage, but instead the energy savings create an increase in demand. This phenomenon is one reason why I and others have concerns about humanity gaining access to a cheap, abundant source of energy.
How efficient are alien civilizations building Dyson spheres to collect enough energy?
I'm assuming that the RTG design improvement is in components other than the source? I can't imagine there being much room for improvement of the source's size since it is already a dense chunk of material and its casing is meant to survive re-entry without burning up or breaking.
That would mean that the bulk of the newly designed RTG is going to be the source with the remainder being impressively miniaturized.
Using another power conversion method. Also, 1/1000th the size and 10 times more efficient means 1/100th the power. So, like 1-3 W, fitting for a cubesat.
11:15 The scariest part of nuclear propulsion is the launch... Any nuclear materials onboard are hazardous post launch failure.
A reactor is just a lump of uranium until it is started, it's only after it is started you get the nasty daughter products. Which is why they plan to start it in orbit where it won't reenter for 300 years.
Sounds like a very serious issue, actually!
I live under a 141,800 square acre no fly zone and I can see; The Great Rift, Polaris, (without a pair of binoculars), and all the planets that can be seen with the naked eye. I own an 8" Newtonion reflector telescope, however I can just walk outside and see quite a lot. I live on 4 acres next to, "The Wichita Mountains National Wildlife Refuge," and "Fort Sill milatary base," (Oklahoma) Which is the largest field Artillery range in the world. That is why there is no light pollution here, except for Lawton, Chickasha, and Duncan, which have a small glow on the horizon. Even when I lived in the Rocky Mountains, in Durango, CO. there was too much light, unless I drove two hours away from Durango. Durango was not a no fly zone either, so planes were everywhere!!! Brother James Kendall Moore OSB OFS OSC
Seems like a lot of money spent to use orion to get to the moon, then transfer to starship to land and get back into orbit then transfer to orion. Hopefully what it really means is that orions days are up and starship will do it all.
Last night the differential and integral really struck: We "are" somewhere, we can "see" velocity, we can "feel" acceleration and "experience" the change in acceleration. To know about acceleration you need to experience, to know about speed you have to feel and to know about position you have to see. Then why do we have to be?
I wonder how much weight the frost adds.
Hi Fraser! Would a nuclear pulse rocket, such as project Orion, feel like someone kicking the back of your chair (or worse!) however often it fired, or am I thinking about the physics wrong? I imagine a bulllride rather than smooth sailing through space. Is there anything out there that would tell us what that ride would be like, had they figured it out?
per the creators and scientists of orion it was NEVER serious for obvipus reasons (the idea is insane). They wanted to do other research but took a shot at this as they knew the vested interests would eat the idea up.
Last night I cast a suspicious eye out for any green comets that may be harassing us, and I could see about 5 stars.
Where I am, 🇮🇪 the problem isn't so much light pollution as humidity.
And if there's any publicised astronomical goings-on, you can bet your arse it's gonna be cloudy.
love seeing you do these, I always enjoy hearing you!
Awesome content
Thermal couple, thermionic converter, ?, ??.
What are their differences in the devices for converting heat to electricity? How does each type operate and what are their ranges of operation?
In the operation of a nuclear rocket, how could these devices be arranged, mixed along the exhaust to generate electricity without compromising thrust?
I am sorry that the equipment inside Of JWST failing so soon. I was in hopes that Scientists and Engineers would have built more robust equipment. It really makes me appreciate the Scientists and Engineers who built Voyager 1 & 2 and Hubble.
Hubvle was broken before it was ever launched... The curve of the mirror was wrong and somehow noone bothered to check that the sincle most important piece of hubble wasnt built correctly. They had to send up a corrective lens. A man developed a fix and offered it to nasa. They ignored him and paid a contractor $$$$$ to do it.. .nasa at least at the time was an incompetant top heavy beauracracy
The potential for nuclear thrust systems is huge, and only thing that has prevented them being commonplace is irrational fear.
Nuclear powered UV/IR laser ablation plasma drives seem like a better option than hydrogen propellant.
What's Chariklo's diameter and mass?
It's over 100 km in size. Don't remember the exact figure. Tbh, this is a Google question, though.
I have never seen the Milkyway :(
"tractor" - my mind goes to a different kind of tractor, I grew up on a farm.
15 seconds later... ooh, it is the same word after all. I had never thought about the etymology of the word "tractor" before.
In the square mile I live in; There are 10 people, 5 houses, and 4 outside security lights. I can walk to my mailbox at night, and I cannot see my hand in front of my face!!! A VU meter, set on my table in my bedroom will read 3DB which is equivalent to a mosquito!!! The house is cement block, brick veneer and stucco.
I have been wondering about this for some time now why does Nasa not equip the landers and rovers etc which use utilises solar panels with a simple broom or duster? I mean isn't it better to risk scratching the solar panels insignificantly rather than cancelling the mission?
I first saw the milky way at age 70 when on a hunting trip 900 miles from home.
I was watching the movie 'Gravity' and thinking about it I'm surprised SpaceX haven't mentioned what they'd do if space junk/debris impacted Starship. Starship is a huge ship that would probably get impacted at least once by an orbiting piece of crap that six decades of littering in space have accrued.
Gravity was a terribly unscientific movie. It could even get a sense of scale right in a Kessler Syndrome scenario.
Don't worry about it, Starship will be perfectly fine.
I've heard of a dog pile but never a cow pile? Strange short Fraser..
If the mechanism for a macro tractor beam is heating up air behind an object, how can that work in space?
re: JWST - it's the aliens! They're on to us!
Light Pollution can be cleaned up EXTREMELY fast if we decide to.
In South Park's immortal words, "Blame Canada!" jk
Wasn't an RTG originally called a SNAP generator?
An acoustic 'tractor beam' has also been demonstrated in the UK
Thank you!
I have never seen the milkyway. Northern Midwest USA.
The faster you get to places like Mars then the more energy you need to slow down once you get there !!
And most conveniently, a thermo-nuclear rocket has that extra energy that is required to slow down.
Isn't laser propulsion just the same as a radiometer. The heat from the energy causes electrons to move causing momentum on the heat surface.
We had a green pump laser in a setup that delivered about 10W. So it was not really strong.
One day I noticed a dust particle had been caught in a laser focus. It was very small and only visible because it scattered this intense laser light. This dust particle stayed caught in the focus for about 1.5 days.
You could market 10W lasers as vacuum cleaners and be a door to door salesman. I, for one, might actually buy something from a door to door literally danger laser salesman
Can you do a video showing what 100 tons of payload for Starship is?
Thanks for all the news, Fraser! 😊
You know, during college I developed a game in Java and OpenGL where you controlled a flying saucer and had to abduct civilians... It was fun! 😂
Anyway, stay safe there with your family! 🖖😊
Very interesting !!!
3600km is very very close !!
If it’s a software problem, they can fix it with some code.
Advanced kinetic photonics is the right way. This is just the Irish way of getting into space.
Someone should tell the big child to put some masive cone below the engines in order to deflect the blast wave sideways. Such a blast wave reflecting straight back to the engines is very very stupid...
I love listing to this when I go to sleep. But I have a question.
Suppose the ISS adds a module that's a big room, a sphere for arguments sake, and you somehow found yourself in the very middle of the room with zero velocity in any direction. The walls are let's say 5m away from you in each direction. In this scenario, could you swim through he air and actually escape or would you be stuck in the middle since every action you make has an opposite reaction.
Would this be any different if you were floating outside in the middle space, if you could not eject material, would you just be forever stuck in the same spot/orbit? Thoughts?
One of the walls will slam into you at 15 000 knots
@@shanent5793 except you are moving at zero velocity relative tot he bubble you are in. You are both falling in orbit at the same rate.
Huh, bioreactors in space. Real life is sounding more and more like a space-themed survival game every day
Yeah, we aren't going to lift cows with that "tractor beam"...
Nuclear thermal rocket needs big heat radiators to keep your craft from melting. So cover these in solar cells and delete the nuclear reactor to save weight.
Great news episode, thanks Fraser!
what?? didn't we get a repair warranty on webb? make them fix it.
They turned it off and on again and that fixed it.
Light pollution also greatly affects animals too. Negatively of course.
Venus: The evening and morning star.
Daddy what happened to Jupiter and sirus?
It's all happening.
Which nuclear rocket are they going to test, the virgin 700 second solid-core reactor, or the Chad 3000 second gas-core ?
I can only see about 20 stars , but with binoculars I am able to see like around hundreds
aw shucks, he's gonna gimme shoutout sometime
In the 1970's a couple of companies experimented with putting nuclear batteries in pacemakers. en.wikipedia.org/wiki/Atomic_battery#Pacemakers
People have always been comfortable taking nuclear to space and off the planet 🌎 the narrative is skewed because of space nuclear treaties otherwise nuclear space propulsion is a misnomer for space based weapons
7:58 yet again discovered too late todo nothing! good thing it was not fly by 70km and crash. 3000km still needle. still that one that will hit and allready collision course we havent spot yet. is that scary?
Don't you want nuclear batteries to be really big? Isn't it easy to make them small?
De-orbit dead/broken satellites with earth based tractor beam?
I hate to put a downer on things as this has been nagging me for too long...but doesn't SpaceX seriously need to show Starship successfully landing more than once???
I wonder the same thing…
Ok, it works, but have a few more attempts to make sure. Or, they are very confident it will work every time 🤷♂️
Definitely! What exactly are you concerned about?
@Tom's Cubes & Games Yeah I'm not sure what goes into making somthing human rated but I would hope they had a successful landing streak of 10+ on earth and maybe two landings on the moon before trying to land on the moon with people.
Then again I doubt they did that for the original moon landings, so.. spooky.
North Korea isn't polluting the night sky, but seriously. we should consider developing best practices for exterior lighting. Otherwise we'll get mandates
Just watching a question show from feb 11, 2022 and it made me wonder if you think Hubble will be replaced. Would it not benefit us to have another newer version up there?
We already have newer "versions" up there. We will still want to use the Hubble as long as we can though, it's still useful.
"Significantly, the lighting has been found to disrupt insects' reproduction. Researchers believe street lights deter nocturnal moths from laying their eggs and put insects at risk of being found and eaten by predators, such as bats.n26 Aug 2021". Light pollution is a big problem for the animal world as well.
Since Webb keeps messing up the establishment theories, I think there are very good reasons why Webb keeps having problems... the findings will cost the scientists lots of funding.
Flying saucer full of cows for the win!
Hoth: Frasier I'm so curious, how close to be near gravitational waves source to damage human and planet
Ps. that asteroid that passed Earth, not concerned about atmosphere, but rather the movie gravity. One cascading explosion of satellites. We'd go dark world wide.
You don't have to worry about gravitational waves, they're stupendously weaj. We'd be shot out of the Solar System by an astronomically unlucky passby of a black hole before we'd have to worry about that.
Have you ever read "TinTin - On A Marché Sur la Lune"?
I wanna know everything there is to know about light pollution.
A stable ring system has to have shepherd moons to contain it.
Question: How does Venus retain an atmosphere if it has no magnetic field?
Carbon dioxide is denser than air so it sinks down and resists being blown off into space, but all the water was broken up and the light hydrogen was stripped away. Venus is bone dry.
@@frasercain I thought Mars atmosphere was CO2. Perhaps Venus gravity > sputtering effect?
Elon should say it would launch on 01.04. and then really launch it!
Hell yes! 100% fuel for every one would be10 % of now if every street light , porch light etc was motion detecter only.....
Why cant we just put big magnets on mars to make a magnetic field so it can keep a atmosphere?
Thanks for keeping us updated with the JWST, I will let my Doctor know so he can adjust my prescription of Xanax accordingly .
The sacramento Kings light a giant light beam every time they win a game. The Beam Team!!!
That seems like an obvious thing that should be regulated. Night lighting is unfortunately necessary for certain reasons, though, so it's not going away completely anytime soon. I'm hoping that tools like AI and advanced, ubiquitous sensors can help reduce the amount lighting used only to that which is necessary. I do think regulations (that are actually enforced) will be necessary, too, unfortunately.
A temporary beam that only goes off sometimes is the wrong target for sure. The problem's gotta mostly be streetlights.
Hey I have a question for you what would your reaction if we found aliens or they found us and made contact with us?
Don’t bother with the name I don’t know how to pronounce it