What Are We REALLY Using Space Lasers For?
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- čas přidán 31. 05. 2024
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Ever since we started launching stuff into space, we've communicated with spacecraft (and astronauts) using radio waves. But over the past few decades, scientists have experimented with a new technique that could make things a lot more efficient: optical lasers.
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Good video, the quantum spooky principle will be use to comunicate like dragon ball z aka rastreador for detectar kii and comunication in space for conquest.
F Linode and you too for making me watch ads and when I pay not watch ads…
@@superstrongr8 seconds at the start, no one forced you to watch the outro ad, get over it. Imagine being so delicate 😂😂😂
One current use of lasers in space is to bounce off the reflectors left by the Apollo missions that allow the distance twixt Earth and Moon to be measured to less than a meter.
Certainly evokes Goddard's flash powder idea.
And then watch the flat earthers do a mental triathlon trying to explain that away.
@@mfaizsyahmi I mean it would more be Moon Landing deniers but sure.
Twixt. Oh jeez.
I always wanted to try that for myself. There is an episode of the Big Bag theory where they do it from the roof of their apartment. 😂. As a Ham I can at least bounce RF off the moon.
It's still mind-boggling to think that lasers were once considered "a solution in search of a problem" lol
I prefer the phrase "Stupid Science Tricks" for that kind of stuff. It's cool and weird but, on a practical level, why bother?
@@Just_A_Dude Most people who say something is a solution in search of a problem merely lack enough breadth of knowledge to understand.
But it was? And then it found many problems that it solved
2:41
"Radio waves are not very good in terms of how fast you can transmit data"
CC: "Radio waves are kinda crap in terms of how fast you can transmit data" 💀
Never gonna beam you up, never gonna wave you down...
I called the aliens on the moon using the laser phone they gave me, so this checks out.
Do not look into space laser with remaining eye.
Pffft. You think the moon exists! Hah.
Sexy.
@@clusterfer I'll show you a moon! 🌕
@@mrmoshpotato that's no moon. It's a space station!
It never occurred to me that they call it a tightbeam in the expanse books because of tighter wavelengths but.... 🤯
It's because it's literally a tight beam, like a laser.
Though all comms in the Expanse would likely use lasers,. The point is that the signal is sent directly to the receiver rather than through a relay network. This makes it effectively impossible to intercept, but requires you to know the recipient's approximate position and course.
@@pseudotasuki Not entirely correct, though close. The reason is that there's three methods of communicating. There's the one you missed, omnidirectional (or less omni- but still not exactly focused) where you are basically broadcasting to everyone with an address (or well, encryption) stuck on the front letting the recipients know who's getting called. Then there's beaming it through relays for when the recipient is too far away for onboard communications to reliably transmit or if there's something in between your transmitter and the recipient. Finally, there's directed transmissions which 'focus' the beam specifically on the entity you want to receive the message.
Tightbeaming is specifically the latter version, or sometimes even the relay network version if the relaying network uses that last method to transmit between the relays, because the transmission is very narrowly focused so only those more or less right in the path between the transmitter and the recipient can pick up the message. So it's great for security and also longer range transmissions due to the same energy being focused along a narrower transmission path. It just has the 'minor' issue that you need *absolute* certainty about where the recipient, or each relay along the path relay network, is or the recipient's not going to receive the message.
Imagine if our first contact with an extraterrestrial civilization is a demonstration that they understand some of our culture, by sending us a Rick Roll!
Everybody would discard it as a prank and would never send a response
The only proper response to that song is "Together Forever." The aliens would know what we mean.
_"Never gonna beam you up,_
_Never gonna set you down,.."_
Rick Roll?
alien found in chat -> @@Svensk7119
I think we will always need a backup to lasers due to LOS problems. For instance if there were a mis alignment or a dust storm.
I can't hear _"Space Lasers"_ without thinking of
*Dr. Evil*
It makes me think of one of America's dumbest congresspersons.
I can't help thinking of MTG. Better not tell her. Lol
...One Million Dollars.
Nice job sci show team
I thought this video was going to talk about the lasers we use artificial star image. It's quite cool when you get to see that beam. I guess for communications would be the same and the technology has been proven already between observatories on land
that's some mighty fine narration.
SpaceX is using signalling lasers to communicate within the satellite cluster.
So, if astronauts use the SpaceX deep space infrastructure, to call home. They are using lasters to call home.
"Radio waves are not very good" he says
"Radio waves are kinda crap" the subtitles say
Pretty good video, just you state that they found they can communicate via radio with "the highest frequencies", which is misleading. I would say they found some higher frequencies which could penetrate the atmosphere
You're telling me the heavyside layer isnt just where jellicle cats go after they're sacrificed by a cult?
Lol, Stefan is so funny with his editing skills. 2:40 He said radio waves are 'not very good'... but the cc said they are crap.
Not lazer, but light as a carrier wave to oscillate a receiver was used in the mid 1800s to communicate over 100km from Mnt Kosciuszko weather station observatory to Cooma in Australia from the top of the highest peak in winter in remote regions. Was the first light carrier. Although I'm sure the ancient Greaks tried it ship to shore back in the day.
NASA's LADEE mission also had a LASER for downlink demonstration.
And nobody did a lunar flash better than LCROSS - at least LRO saw it although nobody on Earth did...
Dont get me wrong lasers are cool af, but when are we going to look into The Professor's Smell-o-Scope technology?
Someone already did figure out what space smells like. It wasn’t very nice
Why is cyrillic script used in the picture about light frequencies? (1:20 - 1:40) Visible light lies beteween 700 nm and 380 nm; not 700 HM and 380 HM!
Obi Wan Kenobi: That's no moon…it's a space station. Han: It's too big to be a space station. Luke: I have a very bad feeling about this.
#saturnexposed
not Cats teaching me about the atmosphere 💀
Space laser tag of course 😉
Moon Unit Alpha or Moon Unit Zappa?
Ancient Southwestern native Americans placed fires in line of sight for communication over long distances.
The message I'd prefer from the moon to the earth is "Hello world"
Thank you for using a dark background!!
And even better, we might someday use a type of laser to propel ships, too - light sails COULD mean leaving the engine at home (or on the Moon as the case may be) -
But you still need some way to slow the ship down at the other end.
@@aliensinnoh1 If we're talking in-system travel, it's just a matter of adjusting the sail to speed up or slow down one's orbital speed depending on whether one wants to go to out from the sun or towards the sun.
We're using them so that we can defend the Death Star. Do you know how many lasers does it take to shoot one single turbolaser blast?? That's why we need a lot of lasers in the space.
Hey SciShow, I'm never gonna give you up.
According to MTG, they're used for starting forest fires.
You're thinking of Jewish space lasers.
Was looking for this comment.
I miss you on tangents ❤
What about using Space Relays for communication?
Have a system of solar system orbiting store and forward relay satellites that use lasers to speed up communication.
❤
Of course eventually but for the moment that would just make the cost of missions multiply more expensive for all the launches or additional costs of relays on one launch. Eventually it is probably going to happen when they have a lot of things needing to communicate at once back home to earth
Seed ships 3d printing the entire network.
Jelicle cats know how to go to the heavyside layer.
You would think, where we use lasers to read things like DVDs or BLUE RAY. We could use that technology to do this sort of communications with space exploration vehicles.
After all, from my understanding, some of the best satellite imagery or high altitude imagery comes from basically using a glorified versions of using nothing more than a bunch of cell phone type cameras that are integrated together.
I know it's not the same thing.
But the idea of using something we know works and using it different applications is the point.
The reverse is true as well. Space exploration and even military development have led to great products we use as a society every day. From PYREX to GPS.
The problem is likely signal degradation over distance. The one big advantage radio waves have is the sheer size of the waves makes them more resilient against very small disturbances. Lazer light will start losing coherence at some point which is likely to introduce errors in data transmission. Making fiver optics on earth require periodic signal repeaters and boosters.
This video reminds me of the set of stories featured in _The Complete Venus Equilateral,_ by George O. Smith, a true classic of science fiction.
Space lasers to play with space cats
Mazel Tov!😉
"in my future, Rickrolls are back in style"
They still are.
Artemis 2, launching tentatively next year, will also use optical lasers. Biggest mission in the near future, people back around the moon.
I'm just curious when we send a radio wave to try contact aliens or rather them knowing where we are etc how *long* would it take for that signal to reach another star? We've only been sending signals for so long so how far have these signals got today, what are the closest stars that have possibly got our "signal" by today?
Our signals have been broadcast for about 100 years. That means, because radio is a form of light, it has traveled 100 light years. The closest star, proxima centauri is 4 light years away. Light "travels" at 300,000,000 meters/second or 671,000,000 miles per hour...difficult quantities to visualize right? There are probably around 4750-5250 stars within that 120 light year sphere. However, just like sound, light will spread out evenly from its source over distance. (Inverse square) That means most signals intended to be recieved on Earth won't have the amplitude to be noticed even at these relatively tiny distances to neighbor stars, let alone at 130,000 ly on the far side of the galaxy. Trying to hear our radio signals at 150 ly would be more futile than trying to listen in on your siblings phone call across a football stadium.
@@kidowan. ly? Yes. it's a common enough abbreviation, or I thought it was, after spelling it out several times I figured the OP had the idea.
This is how we get HPG stations and Comstar, the space AT&T, lol. (Battletech ref)
SETI: We've been trying to listen to alien radio waves for decades and heard nothing! Are we alone?!
Aliens: Silly humans, we stopped using radio eons ago.
You're telling me space lasers arent used to start wildfires?
More need to know this ,it's not just wild fires ...recently seen they are using them on volcanoes too.
@@Edward-6909 Or were the volcanoes using lasers to attack the satellites?
@@Edward-6909 "mOrE nEeD tO KnOw aBoUt tHis"
@@Edward-6909 average conservative
@@filonin2it's true, I was the laser lava :D
This is good to know. So, when we see flashing lights on the moon, we won't have to wonder what that was
So this is jinda random. But at 2:46, he said radio waves are not very good, but the subtitles said radio waves are kinda crap. And this was funny. I wat h with the subtitles often to not disturb others aroind me but i had both on at the same time today
For the first message back from the moon with lasers, I vote or "Ticket to the Moon" by ELO.
[Flash, flashflash, flash flash] ("New planet, who dis?")
The tracking would need to be mad precise.
I just happened to have captions on, and when Stefan says "Radio waves are not very good in terms of..." the caption says "Radio waves are kinda crap in terms of..."
1kb/s data rate is pretty good imo, back in the days dial up using up to 56k modem is about 2-5kb/s, I remember downloading a 20-30mb emulator game took hours.
The issue will be when humans start actually living further out in the system and light delay gets larger and larger; internet communication for gaming isn't the same as system wide communications that could be critical to survival and mission successes
He said 1 kilo BITs. You were getting 2-5 kilo BYTEs on your 56k modem. So your dialup modem was 16 to 40 times faster
Lol
Personally, I'd go for that one very topical song from 1954
*MARJORIE TAYLOR GREEN HAS ENTERED THE CHAT*
Not "PEW-PEW," but, uh, " PRINT "PEW-PEW" ."
heavyside layer that is where Grizabell the glamour cat was trying to go to
MP3 was a failed compression algorithm for space laser communication between satellites, Fraunhofer figured out it was still usable for audio
So THATS what the heavyside layer is? English is my second language, and ive been wondering about that word for at least a decade now.
The spelling is Heaviside layer. It is a proper name of the discoverer, nothing to do with weight or sides.
Or if you’ve been listening to the Cats soundtrack since childhood, you’ve been thinking it was the “Heavyside LAIR” this whole time 😅
doesn't light travel at the same speed - so that a spaceship near saturn would still take MANY seconds to reach earth, and this would only get worse the farther out we go!
It does... however with the longer wavelengths of Radio frequencies it limits the data rate- i.e. change of state of signal to be considered information like frequency in FM (Frequency Modulation) or the pulses in PCM (Pulse Code Modulation). With the much higher frequency of the signals used in a LASER application it can be modulated at much higher rates thus impart more information per second. Think of Dial Up internet vs DSL vs Cable vs EO Fiber lines all those signals are operating at the speed of light per say but the data (information) handling capabilities are vastly different.
@bnthern The issue isn't speed but the amount of information that can be delivered.
How did we know space was a vacuum before going there? Sure air gets thinner higher up on mountains or balloons but how did we know it was a vacuum?
Without googling and just guessing wildly, probably it was a mix of newton's laws and spectroscopy
If it wasn't a vacuum, it wouldn't be transparent enough to allow light from stars so distant to reach us (astronomers suspected that stars were other "suns" for a long time)
If it wasn't a vacuum nothing could orbit. The planets would fall into the Sun.
You kind of answered your own question. Basically Toricellis mercury barometer and answering the question his teacher Galileo was pondering until his death. Basically why you can only suck water out of a hole only so high. You can't suck there is only the weight of earth's atmosphere pushing.
We need subspace communication.
TIL that the Jellicle cats were trying to get to the *ionosphere* using a hot air balloon... I mean it is still a stupid metaphor for death, but less stupid than I thought it was!
How far can a satellite travel through space before losing its signal back to earth ? Are there satellites constant travelling through spsce while sending signals ?
No…
The farthest thing we've ever sent are the Voyager spacecrafts and they are still transmitting. They will stop eventually but only because they will run out of power. If you built a strong enough receiver and a satellite that never ran out of power, a "satellite" could travel until it crossed the horizon of the observable universe and we'd be able to detect it. BTW, satellites are in orbit. Such a craft would be way too far from the Sun to be in orbit.
@@filonin2 not satellites
Controlled burns
So, does that mean that radio waves are composed of photons?
Other way around
we have space lasers??!! well.....
Somebody has fun with the subtitles...
So, satelites are finally getting tightbeams
We need to build a laser highway.
Or a turbo ice cream. Or a fast hamburger. Putting happy words together is fun.
Yeah lasers now we're talking
Could lasers in space one day be used as weapons?
In Europe there are trials using ground based lasers to deorbit space debris.
Wait a rocket scientist names Robert Goddard? Anyone else just realize this is who Jimmy Neutron’s dog is named after?!
I was hoping laser can use as wifi extender, but so far nobody made it :(
Can radio waves be excited into coherent beams like lasers?
I know microwave beams can be -- and the discovery of that effect actually preceded doing it with visible light -- so I'd imagine it works with a broad variety of wavelengths, but I think there's minimum beam diameter (and transmitter/receiver diameter) problems with larger wavelengths. The equipment required gets bulky quickly. I think it's also harder/bulkier to build optics to focus radio waves properly even after you get a coherent source?
Why is pee yellow (most of the time at least)? And coming along with that question: why is it sometimes not?
And why does my scrotum hurt if I think about or see something very painful? It feels like a painful pull or tear.
To strap to the heads of friggin' space sharks! Duh.
I thought they'd switch to entangled particles to instantly transmit data.
Unfortunately entangled particles cannot transmit actual information in any way that's useful to humans. There's no way to check whether or not a particle is still entangled
Come on science, please expedite on the hyper pulse generator network like in Battletech (hopefully without a real-life Comstar).😂
When there are literally thousands of Starlink satellites in orbit, but it only gets a short mention.
Also the European Data Relay System has been using them every day to connect constellations like Copernicus at gigabit speeds for almost a decade.
Lasers are cool, but I'm looking forward to quantum computing becoming mainstream. Entangle those qubits and let's talk instantly, regardless of space/time :)
what if there's organisms that can see radio or microwaves?
What about subspace? Or worm holes? Telepathy? Entanglement? 🤔
Lasers aren't gonna cut it. (See what I did there?)
😉😁
How did everyone watch the moon landing live then?? I've never once questioned the moon landing... But How?
Imagine downloading something at 1kb/s .
Here too rick roll 😂😂😂😂
He sounds like he has a cold? But otherwise good audio. thanks!
I don't think he does
lazors!
כדי לעשות טרולינג למרג׳רי טיילור גריין
No Mana
eww @ all the mental images of MTG flooding my brain whenever "space lasers" was spoken.
The caption on this video is not matching at times. that's weird...
Don't tell Marjorie Taylor Greene
Some of the shortfalls of radio can be bypassed with helical antennas. lso helical antennas are suitable for phase shift keying. That's how the old modems got tens of kilobits of data down a 3kHz or 4 kHz limited voice channel on dial up modems. The only issue I see is you really need to run them at 100GHz and use about 1000 lamda winding antennas. That gives you an effective 34dB gain and is 7.5m long - a bit impractical. You can still get 24dB gain from 100 turns (75cm long) add a dielectric and it gets smaller. The maths get's way more horrible though.
5:34 Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
I remember getting laughed at by a lady professor when I made this point at the end of may Bachelor's presentation on a portable laser communication device
Made what point?
Meanwhile TV remotes are like 💡💡💡💡💡💡💡
@@filonin2 my bad. About lasers being the only really viable communication when we get into space properly
You forgot To light Hawaii on fire
Forthhhhh