Green Space Lasers Detected by Telescope in Hawaii, But What Did This?
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- čas přidán 25. 07. 2024
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Hello and welcome! My name is Anton and in this video, we will talk about space lasers!
Links:
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• A Rare View of the Gre...
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#spacelaser #space #laser
0:00 Space Laser Video
1:00 What Exactly Are These?
2:35 How Space Lasers Actually Work
5:40 So What Created These Laser Marks?
8:05 Other Intriguing Laser Projects
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It amazes me the AP still doesn't have an ad segment in his videos. It's so nice. Best source of space news on the web
In 1971 I was involved with a test of a laser mounted on a helicopter along with a WWII era 70mm aerial camera, the data was recorded onto a Panasonic "briefcase computer". We had a lot of issues with false readings mainly due to snow and ice as well as the distance between individual readings.
Today we have plane based LIDAR that can collect amazing detail and satellites that can aid in ice detection and iceberg tracking that since the Titanic has been done by aircraft as well as many other things about our blue marble traveling through space.
Thanks Anton 😊👍
Hi. Sorry about the green space lasers. It was for a rave in Los Angeles--but my aim was off.
Do I sense a smartass?
Next time, we expect you to improve your aim, mister!
Your credit to humankind is noted and respected good Zebra...
@@Rolatnor zebras are related to the ass, yes.
@@martinliddle3627 thank you!
When I saw this news story the only thing that surprised me was that a green laser was used. I always assumed that IR lasers would be used for stuff like this- but now I understand.
I still don't understand... if green light scatters more, how is that helpful?
@@atlasfeynman1039 the photons need to find a surface that will reflect back, more surface equals more chance
IR is absorbed or scattered by water vapour and greenhouse gasses in the atmosphere. Blue light is Rayleigh scattered by oxygen. Green or red light are less affected.
@@BloobleBonker 3:19 he says green light scatters MORE.
@@atlasfeynman1039 He also said it has higher frequency than blue! Green light is less scattered than blue and has lower frequency. It may have been a slight (and very rare) slip-up.
I think there was a mixup between frequency and wavelength in the video; Green light is lower frequency than blue light, and nanometers would refer to wavelength, not frequency
As frequency increases wavelength decreases
he doesnt know what he is talking about
@@margarita8442 or he made small mistake...you know because we are all human. But from your other comments you've posted you obviously have no clue about anything either.
was looking for this
@@curtharakaly4620 Yes it was just a simple mistake. Anton is well aware that blue light has a shorter wavelength than green light!
Green light would have a _longer_ wavelength than blue. (lower frequency)
"Higher" suggests amplitude rather than frequency.
I can understand that Anton might mix up his terms, but it really throws off the narrative.
Hi Anton, great content as usual 🙂
However, slight correction at 3:21 , green lasers are actually lower frequency then blue lasers, and don't scatter as well as blue lasers. I imagine they use green instead of blue because it's a good balance between scattering too much, and not enough. As with a blue laser there may be too much atmospheric interference to reliably get any light packets back from what they send out. Or maybe it's just because they are generally cheaper
I knew somebody would mention that. Very good. It caught my attention immediately.
@@seanm8030 It's my dream to one day invent a *Brown Light Laser*, if for no other reason it would be impossible and useless.
@@jsl151850b Um... it's not impossible to make a "brown" laser as far as I know. 600nm or so isn't "special" in that way. I don't see any use for such a thing though.
@@seanm8030 We agree on the 'useless' part.
@@jsl151850b It is good that your agreement is not required..
Hey! Thanks for the mention of ICESat-2 from a former IC2 flight op!
IC2 actually mutes the laser quite frequently when passing over other sensitive objects such as space telescopes or the ISS. Makes me wonder if the Chinese use the same level of caution.
Yeah that's what I would have thought. Makes me wonder if it wasn't a satellite, then could it have something to do with the military level green Lazer that china recently used against a Philippine coast guard ship?
love your vids Anton. no fuss, no bs or fluffy filler, just easy to follow facts and info.
In the video he was fussing by claiming that the chinese were not right sending a satelite into space without telling everyone (to the english)
Anton you are the most wonderful person of all! I love your videos, thank you for uploading!
I would like to add that various observatories also utilize ground-to-sky lasers to remove atmospheric distortions in post processing (sort of, at least one observatory physically distorts the primary aperture mechanically based on laser feedback, I don't recall which). This is really valuable when it's done with high accuracy, and is especially necessary for relatively high resolution visible spectrum observations. I don't recall all of the specifics, but the introduction of this tech improved visible light spectrum ground based observation quality quite a bit.
Anton probably knows more about it than I do.
Telescopes have been using lasers to sense, and correct for the rapidly changing atmospheric refraction (due to turbulence) since the millennium. The briefly shining line of excited atoms looks like a point seen from the perspective of the telescope, which is why they are called "laser guide stars". They are automatically scanned and actuators rapidly change the mirror to compensate, often up to 50 times a second. This was the breakthrough needed to make ground-based telescopes surpass Hubble in image detail.
Adaptive optics?
A medium size telescope now because of the laser tech makes it possible to produce images that would have been beyond the ability of Polarmar in the 1960s. In my life time, this has been so impressive.
@@swiftycortex Adaptive optics -they put many many actuators - piezoelectric, I think- behind the mirror which can cause minute physical distortions in the mirror's fine-scale geometry to correct for atmospheric disturbance as measured by the "guide star" - this scheme allows the mirror to compensate for atmospheric distortion, to a fair degree.
If they can use lasers to measure the height of objects, couldn't we eventually have a topographical map of every major solid surface in the solar system? I'd love to navigate a laser accurate map of Europa's suface with all the ice canyons and penitentes.
That's the ultimate plan! So far, only Mars/Moon have been mapped this way as launching these to other objects is a bit on the expensive side
This wouldn't work with Venus though as the lasers wouldn't penetrate the atmosphere
@@whatdamath couldn't they use a different wavelength for the laser?
@@Grunttamer I think perhaps the issue isn't getting the laser to the surface but getting back a usable signal. They probably can sense the laser bouncing off the planet but they can't read it because the thick atmosphere obscures it.
I would think the power requirements would be considerable.
All these worlds are ours except Europa. It's supposed to remain hands-off.
Wonderful as always anton. Thank you. 😊🙏
FYI - Blue lasers are higher in frequency than green lasers.... Great content as usual !!!!!!
He probably meant higher wavelength
For anyone reading. Blue, Violet and White light lasers are all a higher frequency(white light because it contains violet and blue light)
Doesn't everyone know that?
@@unleashed93 ?? No
Blue has a higher frequency, higher frequency means shorter/lower wavelengths
@@twistedyogert Based on the comments, I'd say no. Not everyone knows this, hence the counter points from several different comments.
Hmm, If they had been attached to sharks, I would have suspected Dr. Evil.
Except current laws protects sharks. That's why Number 2 couldn't get them and had to settle with sea bass. At least the sea bass were ill tempered.
I was waiting for this, thank you for explaining this Anton.
Anton, Thank you! Quite informative and interesting. Great supporting video clips and photos. Learned a lot about lasers and obviously space lasers. Haven't been a subscriber long enough to know whether this topic is typical or not. Would enjoy seeing more of the 'space hardware' side, so as to understand the amazing engineering behind these wonderful new tools. SoCalFreddy
Yes i agree
You negative learned about the 🐼🎈 govt, however.. sad
Hey there Anton, I’m a long time subscriber first time poster.
I appreciate your perspective when it comes to biology and the space sciences. You often discuss topics in a thoughtful and measured way.
I felt the need to comment on this video as I feel you misunderstand the Chinese government, not the people, the CCP. I’ll point to an example in this video.
Early in the video you describe the Chinese satellite’s purpose as civilian distinguishing it as such and therefore not military. The mistake here is that there is no policy difference between civilian and military use according to the CCP. The name of this strategy is civil-military fusion.
I realize you try and remain apolitical while focusing on science. That’s very good. However, the CCP has used that against us for decades resulting in enormous IP theft among other crimes. There comes a point that we must recognize an entity for what they are or risk falling victim to their malicious intentions.
Thanks again 😊
At this point, our own government has thoroughly spied on us, that something like IP “theft” sounds ridiculously minor. I’m literally more concerned about SWAT teams braking down doors and killing Americans cooking dinner in their own homes
100% agree
The "q" in Chinese romanized orthography has a sound similar to "ch" in English.
3:19 I OBJECT.
Blue light has a wavelength of 450 - 495nm and
green light has a wavelength of 495 - 570nm. The greater the wavelength, the less cycles fit into a given distance interval and ergo the lower the frequency. The range of green light begins at 495nm, the range of blue light begins at 450nm. 450nm (blue) < 495nm (green), and therefore blue light has a higher frequency than green light
Thank you Anton, thanks for sharing this .
"Sharks with freaking laser beams on their heads!"
Great video :)
Anton upload. I smile.
Your expertise and calm is worth far more than 99% of our media's experts. Thank you wonderful Anton for doing what you do!💜🌌
He has that calmed way of speaking, it's soothing, no clickbait in titles, real science, and.
Of course he has less ranking in yt than one of the more "loud and not that scientific but good super sound fx and bells and whistles.
I knew this is where I could come for the best info. Thank you.
anton you are the best scientist on youtube. thanks for the wonderful education you provide for us.
Great reporting, Anton, as usual!
One really minor comment, I believe the Chinese satellite DAQI should be pronounced "dah CHEE", QI referring to Force or Energy.
We were scanned by aliens for signs of intelligence… guess they didn’t find any…
nah, sat by ch-in-a... and they are detecting depths for ship use in the (near) future 🤐
annnnd, called it, 6:15
😅
You forgot about the dolphins and mice... their number being 42.
That or they realized we are going to kill ourselves and decided to save their resources and just wait.
Thank you for going into detail 🙏
Interesting information, thanks 😊
I just wanna say, its wonderful to hear someone not scream aliens all the time. Its one reason why i come back and leave with a smile. Thank you Anton.
I live on the East coast of the US and over the course of a few months a number of years ago would see similar green laser streaks from the sky at night. The first couple I saw I thought were meteors, but after a dozen or so sightings saw that they were far too straight and identical for anything like that. I now believe they were associated with the NASA P3 Orion borne LIDAR instrument missions operating out of Wallops Island Va. I think a green laser is used along coastal areas because it can penetrate water and show the topography of the bays and near coastal waters. They likely fired up their LIDAR to test it after lifting off from the nearby (sort of) Wollops airfield before heading off for mapping missions up and down the East Coast, and that's why I would see it often.
Don't forget the very common green consumer lasers. They can easily be seen for miles away, I have one on my rifle (For shots closer than 25 yards).
I hadn't considered this (the lasers) as an explanation for what my mom said she had seen, which was a "brilliant green meteor"! Which, I had assumed to be a copper-rich meteorite, but couldn't dig up any instances of such. This might explain it though... 🤔 (dunno about the P3 Orion, as we're in E. Tennessee, but still)
@@EC-dz4bq I didn't think of that, but these were always straight up and down, and a brief pulse. (Maybe goose hunting at night ;-)?
@@DUKE_of_RAMBLE Yep, copper rich meteor, same thing I thought at first (brilliant minds run in similar tracks ;-) East TN must be pretty country, and you do have that big river up there that might call for a green LIDAR.. Or maybe it was a copper rich meteor?
Cool. Thanks for sharing.
I always have to watch ..... until the smile ! Its so refreshing to see.
Hello wonderful people
Anton. Thank you for the amazing podcasts.
I have a question about the accuracy. The speed of light slows in air and the density of air and its depth change. How do they get the published accuracy?
Again thanks for your great work.
John
good question, I guess they can also measure temperature also from satellite. but temperature would vary across full path and also air density.
So good to see you. ❤️
Frequency/Wavelength: should have said blue or green laser has higher wavelength? ROYGBIV in frequency is from low to high numbers, where the color spectrum in wavelength numbers is from higher to lower...😀
Thanks Anton, I just hope all these lasers firing back to earth will not inadvertently blind some amateur astronomers who may be stargazing through their telescopes right at the very moment such a satellite hits them with their beam. Did anyone do any study on that?
yes
Sure, No one seen anything.
Great. Maybe the Chinese can use their lasers to de-orbit the mess they made blowing up a satellite in space.
As long as it is not ethnic cleansing...I trust it is surely only for the good of the planet.
Very interesting. Thank you sir
TY Anton for giving this video the green light.
I am aware that SpaceX uses lasers in their StarLink constellations to communicate and range-space themselves. However, I do not know they laser spectrum (red, blue, green).
infra red
I think they only use lasers for craft-to-craft communication in orbit. All ground stations are RF I believe.
@@iinRez I believe that is correct. However, I could imagine one of the many StarLink satellites now in orbit, one could go rogue and begin spinning wildly. I just wish there wasn't so much mistrust around the globe and the owner of that satellite raise their hand and say "yep, that was us". Cheers.
Anton, civilian use in China is also military use. It's like how GPS is both civilian and military use for the USA only much more encompassing.
*Any* organization in PRC has the Chicom Party for a business partner, or "consultant."
@@lordphullautosear yep.
Fine mapping and altitude data absolutely has military applications. For instance, in low-flying cruise/tactical missile waypoint programming in order to avoid radar detection and early warning.
So what ?? it's the same for USA.
You are the man, anton!
Beautiful teacher great subject
Absolutely agree! 💜🌌✌️😎
And now it has burnt down???? A built up area surrounded by rainforest doesn’t just burn?
Climate Change
I also learned that green lasers shown into the eye to repair tearing retinal fibers causes intense nausea. Doctor asked that I fast for 24 hours before the surgery. I wasn't quite sure why at first, as it didn't involve any actual cutting or blood work. Then I learned about the green laser, and OOOOOH boy. I managed to hold back the dry heaving long enough for the doctor to repair the retina.
That is NOT a fun process!
@@zaraak323i
Not fun but also not that scary or painful anyway, also I never had to fast before...
Science!
Class IV: High power lasers (cw: 500 mW, pulsed: 10 J/cm2 or the diffuse reflection limit) are hazardous to view under any condition (directly or diffusely scattered) and are a potential fire hazard and a skin hazard. Significant controls are required of Class IV laser facilities.
Thank you, Anton.
Class IV: High power lasers (cw: 500 mW, pulsed: 10 J/cm2 or the diffuse reflection limit) are hazardous to view under any condition (directly or diffusely scattered) and are a potential fire hazard and a skin hazard. Significant controls are required of Class IV laser facilities.
I saw this laser scanner lights here in Texas. That day was raining all day and i saw it around 9pm at my apartments parking lot. Looks exactly like in this video .
Just a graphics glitch, its getting fixed in the next GPU driver update.
I'm glad you took time to report on this phenomenon. We need more thoughtful analysis like, to help keep the public from jumping to conclusions, and to dispel general paranoia. Let's hope your video spreads like wildfire!
It'S aLiEnS yoU FOoL! The time has come! The God Emperor of Mankind is here at last!
It won't stop them, your thoughtful analysis just makes you a gov't stooge in their eyes. Covering things up!
Let's assume the public are idiots, not like us
@@alexsnow3319 jesus, do you not know how to have fun? Screw the government, they have absolutely no power, the only thing they can do ia try and not piss off a sizeable number of their voters, otherwise. They shall burn in the Emperor's holy cleansing fire!
@@bigzed7908 you need mental help. Learn to read and comprehend.
hi, saw it some days ago .. looks somehow very cool
Thank you 🙂
It's all fun and games till someone builds a Death Star...
lmao
It's all fun and games until someone looks up and burns out a retina. Do you know how much paper burning out someone's eyes creates? It's not fun at all.
Dr Evil ponders new evil
I heard the laser reflectors left on the Moon by the Apollo lunar mission are still in use today. Can anyone shed any additional information on this? Thanks!
They're used to precisely measure the distance between the Earth and Moon to an accuracy of a few centimeters, if I remember correctly.
You are a breath of fresh respite. Glory to the grateful
Who's here after the fire in Hawaii?
just some days ago 1 million, now already 1.11 - really happy to see so many people listen to a wonderful person like Anton instead of those scam channels that just surf on some bs.
Thanks budd!
Am I the only one who finds laser light kind of hypnotic?
Mapping to figure out what buildings to destroy.
Can't fool me. Those are the Alice in Borderland lasers.
Incredible amount of money raised Anton. Truly an amazing person 💪🏾
Perfect!
... just a geopolitical adversary mapping some of our most strategic terrain. No reason to be alarmed.
Anton: This technology has really matured in the last few decades.
Me: I don't know. Those lasers still look like hoties to me.
This is awesome!
Class IV: High power lasers (cw: 500 mW, pulsed: 10 J/cm2 or the diffuse reflection limit) are hazardous to view under any condition (directly or diffusely scattered) and are a potential fire hazard and a skin hazard. Significant controls are required of Class IV laser facilities.
I hope you spelled it out. I read this a while back while wanting to apply to technical uni: Light Amplification by Stimulated Emissions of Radiation, and contain only limited wavelenght of light photons
I just hope all of these Space Lasers are safe to use. If one of those Lasers accidentally shone in someone’s eyes, could it potentially cause blindness in that person’s eyes?……. ⚛️☮️🌏
Given the general history of the last 100 years, I'm going to assume that we THINK it is safe, but it probably has some consequence we don't yet know of
This isn't really my area of expertise, but I suspect that if you happened to look straight up at exactly the wrong time in exactly the wrong spot, it MIGHT cause temporary blindness.
I doubt the risk is very high because, 1) These pulses are really, really short and probably don't deliver enough energy to cause serious damage, 2) The distance from orbit to the ground is large enough that the laser will spread that energy out over an area that I suspect is much larger than a human eye, and 3) The agencies operating these satellites wouldn't want to fight a bunch of injury lawsuits, so they probably calibrate these systems to make them safe for bystanders.
Woah- there was so much more information mixed in here than I’d expect. LiDAR has travelled (haha) so much further than I had realized!! Also that silly Chinese satellite lol 🛰
Such a silly little. Not a spy satellite at all has nothing to do with nothing. Just a silly little satellite hahaha
Silly USA's politicians
I like how my comment looks political but it’s talking about the video lol
@@WingofTech gas light much?
In light of reccent events, it being a chinese atmospheric satellite is not only ironic, but quite funny too. The conspiracies are fun to watch go around, but the science behind the technology is way more interesting
I didn't realize we had developed TIE/LN starfighters, as can be seen in the debris field at 13:45 left of center :)
They are detecting depth for future submarine use
oh look 🎯 6:15
Talk about the UFO sightings lately!
Good tech talk.
I get all this. My concerns are about the location, who, why, and timing.
ffs don't let Marge Green see this!!!
Ikr lmao..she's gonna eat this up
Don't let the History channel get this. Aliens! 🤣
Maybe the real Jews were the friends we made along the way.
Like the vast majority of things that seem strange there's a ordinary explanation. Most anyway.
Not benign though. Very little reason for a country that cares nothing a about the climate to suddenly start launching mapping satellites that can see through foliage and cover under the guise of aerosol and CO2 data.
Especially when it's seen scanning one of the most tactically important military islands in the world.
The spy balloon cunningly changed direction when the wind changed
Spy balloons, UFO's, ChatGPT telling humans to behave, and now space lasers
This is manna for science fiction fans
Next...large black monolith found in Africa
@@Ranstone Absolutely! Anton is too trusting, doesn't have a bad thing to say about anybody even if it's the CCP hell bent on world domination
Asking as a layperson... Green light is higher frequency than red but not blue right? Just wondering if that was a mistake or if I'm missing something.
i love how the title pretends not to be clickbait but it is
I've always wondered about the effects of ground penetrating methods from orbit. One time there was a fluttering green light when we were going to bed and I was noticing that it hardly mattered with eyes open or not, so I asked the wife if she can see this, and she confirmed the eyes open or not without asking about that. Only thing I can think of is Aurora through the house, we do live in a high gravity area just above the 45th Parallel.
agree
@not today Wrong - it's gnomes. It was just a gnome light.
I dont understand
@not today lol what
Could be a lot of things considering that the eye is more sensitive to the color green at lower wave lengths. I just repeated what Anton already said in the vid.
Chinese space program is ran through their military. So anything that goes up is default militaristic
And by default the research is civilian, so, it doesn't really matter.
@@subcitizen2012 everything civilian is shared to the military when it comes to the CCP
Anton has always been too trusting in Chinese projects and missions
You don't think the US government/military gets info from Nasa or space x to improve militarization and government control? I wonder why those two big companies are subsidized by the government if the government doesn't get anything out of it 🤔. US and China are the same, they have the same intentions and do the same things to other countries and their civilians. I don't care what China is doing because the US is doing the same thing.
@@roopi67 because it's the same for other countries including USA nothing new here.
You had me at space lasers
I always thought Red China would use only “red” lasers.🤔
Yes. But the only thing that doesn't make sense is China caring about the environment.
Probably just aliens trying to shed some light on Uranus.
Youch!!!
Some curvature-of-the-Earth calculations need corrections for the density of air varying with altitude - light no longer travels in exactly straight lines (at exactly the same speed) when going deeper into the atmosphere or coming up from it. How much of an effect does this have on using photons' time-of-flight to measure the distance to the ground?
Could you tell us about that paper which proposed that black holes release dark energy?
Surprise: The reflected laser can receive a reflection off hard surfaces. They can receive voice conversations because the reflected signal can be modulated by the hard surface.
Interesting. Did not know this.
Is that you, Evan Mecham? I bet it is.
@@williebeamish5879 The White House has buzzers on the windows to disable laser sound recording. They rattle the windows at human voice frequencies to defeat laser surveillance.
Is that even possible from that distance? Though it won't be surprising for the Chinese government to try that after all the aerial spying they have been attempting !
Yes, this is true, but not from space. The atmosphere is limiting the resolution of the laser, and the atmospheric variance in signal will be much larger than from the vibrating surface.
Lasers can be used for listening devices from quite the horizontal distance under the right circumstances (like cold, clear nights), but vertical resolution is tricky, for many reasons.
It would be a safe bet to asume China is using these satellites to keep track of the location of major U.S. and Japanese warships, for anti ship missile targeting.
Not likely. They have optical satellites they would use for that sort of thing.
Except to anyone that knows the limitations of those lasers, it’s not used to keep track of ships
@@TheZachary86 Congratulations, you have made the stupidest post of the day - if the laser can measure the surface of the ocean within 1 inch it can track a 1,000 foot long aircraft carrier - D'OH.
@@MontegaB The precision of laser tracking is superior, that would be better when one wants to aim a missle.
You can get very high resolution maps LIDAR
Ancient Aliens were trying to figure out how to order Hawaiian Pizza.
AWSOME VID AS USUAL, I HAD NO IDEA THIS WAS A THING... THE MORE YOU KNOW
Class IV: High power lasers (cw: 500 mW, pulsed: 10 J/cm2 or the diffuse reflection limit) are hazardous to view under any condition (directly or diffusely scattered) and are a potential fire hazard and a skin hazard. Significant controls are required of Class IV laser facilities.
Any space company in China will share ALL data with the ruling ccp. These companies are never separate from the government. That means military too.
No shit ,Same with USA and other countries.
@@abdrhmanzitoun9658 Are you saying Elon shares users data with the government?
@@Veeger yes since he uses his satellites to aid Ukraine military I don't see him not aiding US military and intelligence agencies( meby even forced or sponsored , ....).
It's a lydar system, set up by the CCP to scan for structures in Hawaii (or elsewhere) which is an important geo strategic center. Thanks Anton for covering that part of the situation. Too many bosons in physics and cosmology, not enough fermions.
There is a military site very near Mauna Kea (where this observatory footage was taken.(
Yes, there''s a military training area just a few miles away. However, not a very interesting one and a highway runs right through it so you can see it all from the roadside.
@@relativeus exactly
@@brooksrownd2275 we dont know what is under those structures, which is probably what the CCP has been trying to get at.
@@brooksrownd2275 that's a violation of airspace.
You're a wonderful person too, Anton!
I have wondered the gelatines used in ballistic testing would be useful for catching space debis. I saw one video on youtube where a guy fired into the same one with a pile of different guns and it did really well.
I'm sure Garand Thumb would be willing to donate the remnants of his many torso ballistics tests he's done 😉
The only issue would be the freezing vacuum of space. Wouldn't they just shatter upon impact? I honestly don't know.
Wasn't there a mission that used aerogels to capture space dust?
Going to be some genius who will say “but, but NASA said it was not them”
@3:25, green light is lower frequency compared to blue lasers. It is higher frequency compared to red light.
I saw them a week ago in Central FL
I like how all the scientists have protective gear while working with lasers as they're bombarding the rest of us on a daily bases.
What? You think we’re being “bombarded” by lasers? Are you high? And it’s *basis*
@@ken7165 everyone knows that caesar's conspiracy was the only one. FACTS. 🤣
Whatever you do, don't look up. This way you don't stare into the lasers.
They are wearing that "protective gear" for the satellites safety.... not their own... its to keep any dust, germs, etc out of the satellite to keep it clean to avoid any dumb malfunctions from dust + to avoid any cross contamination into space so we know for sure if we find life out there that it is indeed alien.
They wear protective gear to prevent from contaminating the extremely precise and delicate equipment on the satellites, not to protect them from harm lol. They work in a dust and contaminate free facility so thats normal clothing.
BTW.. thank you very much Anton for the very good explanation for this. People need to stop chasing shadows (or balloons) whenever they hear the mass media causing mass hysteria.
Not a good explanation at all, in fact quite the opposite. He starts by saying these sorts of lasers are used to map the surface but not this very low tech Chinese one. This very low tech Chinese one is monitoring the atmosphere which is actually far more difficult to achieve which he verifies in his supposed explanation later. This explanation was in fact far from clear it was actually verging on utter gibberish. I do not suggest it is Aliens or indeed have any theory, I am not going to pretend I know what the answer is but this supposed answer might convince those wanting to be convinced or fools but not anyone with a modicum of intelligence or critical thinking.