That's why I don't believe we've EVER been visited by Aliens, and when we are we'll definitely know! They wouldn't travel this far just to do a bunch of fly-bys and hiding around like big foot.
Exactly, and if their technology can get them to travel here, I doubt they would "crash land" like many alien clichés or get caught by the American government.
My guess is they'd send an uncrewed probe first, assuming they have any sense of caution. And if it transmits, or even uses power to transmit, it would be seen by multiple space agencies, the military, and probably some amateur astronomers. It'd be practically impossible to hide such a thing.
Lord Lew- I’m not going to run into conspiracy theories, but it’s quite possible (brace yourself) that the government knows of the existence of other life and just keeps it classified for various reasons. The motives are irrelevant for this argument. There are many things the government doesn’t want the people knowing and, judging by the initial admission by government sources that Roswell was a UFO, then the abrupt change in stories is at least curious and possible proof of my point. Unfortunately, we’ll never know for sure but man do they keep certain encounters close to the vest.
Wrong, if they're intelligent enough to visit us then they'd see the wars. If we're bad enough to be constantly killing each other and rapidly wiping out all the other species on the planet then why wouldn't we be a threat to them? If aliens visited us then it's 100% guaranteed that militaries across the world would be trying their best to figure out lots of ways to kill them. Aliens, if you're listening, best stay quiet until we show signs of not being so stupid and murderous.
YT tends to promote comments with lots of comments more than those with lots of likes, so commenting with a + is a like but weighted more in the YT algorithm. :)
Eugene InLaw we can detect them by the wobble of the star but it needs to be big enough effect...... also we have a few direct observations of close up planets
One thing to consider, too, is that we tend to find a lot of planets using the transit method that take only a few days to orbit their sun. Any observer watching our solar system would have to watch it for a at least a year at minimum to determine any kind of pattern in a decrease in brightness from our star. Even Mercury's 88-day orbital time is incredibly long compared to what seems to be the average of 2 or 3 days for a lot of the planets around red dwarf stars.
Good point ! Even our most recent human relative wasn't all that curious, but it was the reason of their downfall in relation to us, so perhaps it's evolutionarily more beneficial for an intelligent species to be curious. Perhaps the probability of these two ideas sort of cancel out, for the consistency of the above probabilities.
Or there is the idea that Xenophobia is a thing. Like the humans in Warhammer 40k, its literal heresy for other aliens to exist within the glorious empire that is mankind.
What makes you think that the alien species would be stronger than us ? They may just have some damn good scouting technology, but not weapons. Perhaps, as the civilisation became smart enough to leave their own planet, they found no use for weapons other than self-defense. Quite like how, on earth, war is becoming out of fashion.
+naihanchin Kempo I doubt we'd have much resource wise to interest them. Our planet is one among many. Would you go out of your way to destroy a random ant hill you drive by? And if it's research they're after, there are many non-intrusive ways to study us.
Any alien civilization that achieves interstellar travel will have gone through the same development that we did. If they think we're stupid and malicious, then they're hypocritical at best, and forgetful of their own troubled past at worst. Don't think humanity is uniquely terrible.
*+J.J. Shank* That's a bold assumption. Formed because you find it impossible to imagine that other civilisations could form in a non aggressive manner. We don't know if there are two genders (please, just go with that - not here to argue about "other" genders amongst humans in this context), if species forbears had to fight for resources or shared what they had. Or earlier than that, if they had aggressive tendencies prior to civilisations forming. So many possibilities. Definitely something to think about though.
If a far away alien civilization in a billion years were to use images of our galaxy to calculate something about magnetic fields ... could we sue them for copyright?
Tesser 4D Well earth makes up an indistinguishable part of the light our galaxy gives off, but dat's still our light. Actually nevermind we just reflect it from the sun, sunpeople got dibs
I doubt an advance alien race, would be using a primitive method such as the transit method to detect planets. They likely have methods far beyond what we could even imagine. Since Space is beyond huge, and traveling through space is limited to the speed of light, an alien race would have likely figured out a way to bend time, for all sorts of travel from communication, space travel and observation.
Consider too - we've been radiating RF into space for close to 100 years, so effectively it's dissipated out 100 light years. Yep, RF moves at the speed of light.
If there are intelligent aliens anywhere that are similar to humans instead of traveling the stars and discovering new galaxies they're probably locked up in some room simulating they're perfect reality because that would be easier more achievable and cost-efficient
I think it's probably safe to assume that any life intelligent enough to develop such tech would also have developed away from any type of economy. Greed is a very human thing anyways. The possibly that another intelligent life form has also developed that vice is slim to none.
I don't believe so. Any simulation -- even a perfect one -- will require energy. And more energy means more simulation. So unless all those aliens have completely forgotten about the real world, they will always be looking farther and farther afield to gather new energy sources.
That percentage was much higher than I assumed. Planets are tiny and orbit at relatively enormous distances. So I thought that the chance of seeing one transit its star given a random angle of view was horrible. Ironically, I found this video uplifting.
They need like and love buttons because this was amazing. I never considered magnetic fields gor galaxies, and the orbital orientation is such a simple and interesting limitation to our count of exoplanets that I'm intrigued!
I sometimes try to imagine the ecosystem of a distant planet, I don't know if it'd be as bizarre as SCI-FI media depicts, but it's very possible that evolution happened fairly different than earth, heck, maybe life there stayed unchanged, it's awesome to wonder about.
How far away could we pick out our own radio signals if we were looking for them with our biggest radio telescopes? IE How far away could we spot us by our radio signals?
Last I heard, we couldn't detect earth quantities/intensities of radio waves further out than our own solar system. But picking up "something" rather coherent signals is much easier, of course.
Would be WAAAY less than 200 years. The first radio broadcast was in 1906. Anything before that was too small to be detectable, and even that broadcast probably can't be detected by other solar systems. You don't get a strong pressure of signals until Television broadcasts became a regular occurrence in the 30s. So that's about 87 years, except we're already quickly moving away from radio signal broadcasting even now. By the time we hit a century, we might be all the way back to pre-1930s level, and eventually we may end up settling down to 1906 levels as everything switches to satellite/cable/wifi. That's not much time left for aliens to notice us.
The title in the thumbnail sounds like the despondent rhetorical question of a SETI researcher arriving at the final stage of a psychologically-crumbling existential crisis.
The transit method is very primitive the James web telescope will allow us to see these "hidden planets" even if we assume that alien civilizations take 1,000 times longer to go from Kepler to James web style telescopes than the odds we would catch them while they are in this "partially blind" faze would still be minuscule...
Your hair always gets me. I cut my own hair, and I don't get those random hair puffs. That being said, did scientists really think that gravity would change over time?
Aliens probably know so much about the universe that they know the past present and future of every point in the universe without ever having to go there.
We can only look for life on earth like planets because that is Our only reference point. Everyone knows alien life could probably evolve under different circumstances but you can't search for something if you don't know what you're looking for.
Maybe. Or perhaps it is isn't necessary and they use some sort of motion sensing type sonar in order to detect predators/prey, similar to many animals on earth. Or, perhaps they see a different part of the light spectrum and only can see ultraviolet light.
I have a question - is it possible that there could be other planets in our solar system that we just haven't spotted yet? Or what is the likelihood of there being another planet amongst the inner planets that we for whatever reason just didn't notice?
and yet, despite the low stats, we've found lots of planets. The same would go for others -- there would be plenty of other planets that could see us, if they looked.
What if they see us but we don't see them? Since we are pretty much looking into the past when we look at planets because light takes time to travel, they might already be some advanced species so near but yet so far. Then never know if we exist or not as they too will look into the past to some degree to se use. Only way around this is possibly black holes, or long distance quantum teleport which is the only experimental possible way of transferring data where the speed is much greater than light.
I think to find the chance that an alien species would find us by transit would also need to factor in the chance that said civilization was at a similar level of interstellar observation as we are, since less advanced or much more advanced species would most likely employ other methods, no?
I suppose that if they're advanced enough, they could position listening outposts outside of their solar system or on other planets within their solar system. Or maybe we could bring a 360 degree sensor array into orbit around our own sun so we would only miss the spots behind our sun. I don't know if that's possible with space debree flying around though.
If Aliens have not discovered us, it means that their technological progress is about the same level as us or probably even lower level then us. So it is considered good news because as of now, no Aliens are more advanced then us.
Well we are heading in the right direction with looking at magnetic fields. Now we just need to dispel the inanity of gravity holding the universe together and we will be on our way to understanding what is going on.
Do you think aliens would be able to detect the massive EMP bursts from when we set off nukes? Would those just be like massive jumpscares for interstellar radio listeners?
Another issue I havnt heard mentioned on the topic of aliens is that when we look at these exoplantes is that They are So far away that if they are more than 200,000 LYs away they wouldn't even see human life
Amber Smith so? complex life has existed on earth for hundreds of millions of years. Any aliens wanting to answer “is life unique to our planet” would be thrilled to see earth even if they’re seeing it hundreds of millions of years ago.
attack because they’re thousand of light years and and humans will be extinct by the time we get a response (if we even could get one) so there’s no point really.
What about our radio waves? I always wondered if SETI was sensitive enough to see radio transmissions from other worlds. Would aliens be able to see our radio signal. Wouldn't it be too weak to see a few light years away?
That's a good method too, but it works best for heavy planets orbiting very close to their stars. Smaller planets farther out (like Earth) won't have a distinguishable effect.
Of course they see us, they're just staying away from such a violent planet. Would you go to a planet that has billions of violent aliens that are destroying there own planet and treating each other in such violent and horrific ways? Now imagine those aliens sending messages to space inviting you to make contact with them and come to there planet 😂😂
So is the first percentage he gave true in reverse? Do we only have a 2.5% chance of seeing a planet transit around any given star? If so there's a lot of planets out there we haven't seen! Also I wonder if they've moved Kepler to observe other transit angles we can't view from earth? I realize we couldn't confirm its findings, but it would give us a better idea about what we can't observe ourselves
Alien civilizations may be using techniques presently inconceivable to us, just as radio waves were inconceivable to people living in the Stone Age.
Physics Videos by Eugene Khutoryansky excellent point
I call Palantíri 👀
"Show a caveman technology, and he will think it is magic, show a modern man magic, and he will think it's technology"
You still can't prove to me that the glowing rectangular communication device in my house isn't magic.
There is no such thing called magic.
That's why I don't believe we've EVER been visited by Aliens, and when we are we'll definitely know! They wouldn't travel this far just to do a bunch of fly-bys and hiding around like big foot.
Exactly, and if their technology can get them to travel here, I doubt they would "crash land" like many alien clichés or get caught by the American government.
My guess is they'd send an uncrewed probe first, assuming they have any sense of caution. And if it transmits, or even uses power to transmit, it would be seen by multiple space agencies, the military, and probably some amateur astronomers. It'd be practically impossible to hide such a thing.
Lord Lew alien shill
Lord Lew- I’m not going to run into conspiracy theories, but it’s quite possible (brace yourself) that the government knows of the existence of other life and just keeps it classified for various reasons. The motives are irrelevant for this argument. There are many things the government doesn’t want the people knowing and, judging by the initial admission by government sources that Roswell was a UFO, then the abrupt change in stories is at least curious and possible proof of my point. Unfortunately, we’ll never know for sure but man do they keep certain encounters close to the vest.
Wrong, if they're intelligent enough to visit us then they'd see the wars. If we're bad enough to be constantly killing each other and rapidly wiping out all the other species on the planet then why wouldn't we be a threat to them? If aliens visited us then it's 100% guaranteed that militaries across the world would be trying their best to figure out lots of ways to kill them.
Aliens, if you're listening, best stay quiet until we show signs of not being so stupid and murderous.
Do an episode on Space Colonies/Habitats. Like the different designs there's been, future designs, how we'll build them and how they would work
Dart Mada +
Karli Higley you liked my comment?
+
YT tends to promote comments with lots of comments more than those with lots of likes, so commenting with a + is a like but weighted more in the YT algorithm. :)
SciShow Space - Do _Big Dumb Objects_ like Alderson disks and Shkadov thrusters.
It'd be cool if there's an alien civilization on a planet very close to us, we just can't see each other cuz the orbits aren't right
Eugene InLaw i think we can actually detect exoplanets close to us by methods other than transit.
Eugene InLaw we can detect them by the wobble of the star but it needs to be big enough effect...... also we have a few direct observations of close up planets
Tanmay Sachan we cant detect earth-like planets as easily as super-jupiters
Bro. Your collar.....
Gardur Bakk lol
Drove me crazy the whole video.
Quit discriminating against Dracula-Americans.
When he pops his collar, the bitches holler
Bro, his hair!
One thing to consider, too, is that we tend to find a lot of planets using the transit method that take only a few days to orbit their sun. Any observer watching our solar system would have to watch it for a at least a year at minimum to determine any kind of pattern in a decrease in brightness from our star. Even Mercury's 88-day orbital time is incredibly long compared to what seems to be the average of 2 or 3 days for a lot of the planets around red dwarf stars.
Another question we need to ask is, "do aliens even care about us?" We assume aliens will be curious, like humans, but what if they just aren't?
Good point ! Even our most recent human relative wasn't all that curious, but it was the reason of their downfall in relation to us, so perhaps it's evolutionarily more beneficial for an intelligent species to be curious.
Perhaps the probability of these two ideas sort of cancel out, for the consistency of the above probabilities.
Or there is the idea that Xenophobia is a thing. Like the humans in Warhammer 40k, its literal heresy for other aliens to exist within the glorious empire that is mankind.
because it's unlikely that would create a technical civilisation capable of spotting us without curiosity
What makes you think that the alien species would be stronger than us ? They may just have some damn good scouting technology, but not weapons.
Perhaps, as the civilisation became smart enough to leave their own planet, they found no use for weapons other than self-defense. Quite like how, on earth, war is becoming out of fashion.
+naihanchin Kempo I doubt we'd have much resource wise to interest them. Our planet is one among many. Would you go out of your way to destroy a random ant hill you drive by? And if it's research they're after, there are many non-intrusive ways to study us.
I feel like if aliens could see us now it'd be kind of like your neighbors seeing you in your underwear... We're not ready for guests right now...
noxabellus true that
Any alien civilization that achieves interstellar travel will have gone through the same development that we did. If they think we're stupid and malicious, then they're hypocritical at best, and forgetful of their own troubled past at worst. Don't think humanity is uniquely terrible.
J.J. Shank Wow.......that gave me some to think about
Maybe we are going the be the very first interstellar species in our galaxy and then we spy on our neighbors and they are afraid of us :)
*+J.J. Shank*
That's a bold assumption. Formed because you find it impossible to imagine that other civilisations could form in a non aggressive manner. We don't know if there are two genders (please, just go with that - not here to argue about "other" genders amongst humans in this context), if species forbears had to fight for resources or shared what they had. Or earlier than that, if they had aggressive tendencies prior to civilisations forming. So many possibilities. Definitely something to think about though.
I definitely anticipated that this would be a discussion of whether alien sight would work the same way ours does instead of this.
Imagine if the scientists actually DID finish their paper with a "Forever Alone" meme... XD
LOVE the van gogh starry night galaxy image!
What if they have an extremely large telescope in space?
Brittany Webb that would explain why they haven't attempted to make contact yet
Indra Otsutsuki being pretty sure, and an assumption are two different things. something tells me youre just assuming.
Indra Otsutsuki oh I have no doubt that they have made contact before but the fact that they haven't since is understandable, all things considered.
They already looked at us with their extremely large telescope, they didnt like what they saw, because we were Mooning them.
...ehhhh....
Brittany Webb They would just see dinosaurs or some other extinct species depending on their distance from earth.
what if there is a planet where every single “alien” is assigned one of us just for entertainment and curiosity purposes...?
Measuring stellar wobble over decades (a la space race) should be good for finding 'earths' at nearby galaxonomical distances....
If a far away alien civilization in a billion years were to use images of our galaxy to calculate something about magnetic fields ... could we sue them for copyright?
TheYuvimon Obviously. You clearly do understand copyright! I'm really proud of you!
Not really coz they are out your Jurisdiction.. You can't do anything
Have we made our galaxy? No. Copyright on earth is maybe possible, but not our whole galaxy
Tesser 4D Well earth makes up an indistinguishable part of the light our galaxy gives off, but dat's still our light. Actually nevermind we just reflect it from the sun, sunpeople got dibs
Earth laws would probably not be enforceable on them, especially if Earth is actually Alien territory.
Woah! The galactic magnetic fields shot was like "Deep Space" by Van Gogh!
Great.. so I've been combing my hair before leaving the house for NOTHING.
I doubt an advance alien race, would be using a primitive method such as the transit method to detect planets. They likely have methods far beyond what we could even imagine. Since Space is beyond huge, and traveling through space is limited to the speed of light, an alien race would have likely figured out a way to bend time, for all sorts of travel from communication, space travel and observation.
You're my fav host of sci show and sci show space
Consider too - we've been radiating RF into space for close to 100 years, so effectively it's dissipated out 100 light years. Yep, RF moves at the speed of light.
If there are intelligent aliens anywhere that are similar to humans instead of traveling the stars and discovering new galaxies they're probably locked up in some room simulating they're perfect reality because that would be easier more achievable and cost-efficient
Any species with actual intelligence would prefer reality over fantasy. Self-delusion may be more cost efficient and easier but I like real life.
filonin2 there will be a point where you won't be able to tell the difference. Ala inception
I think it's probably safe to assume that any life intelligent enough to develop such tech would also have developed away from any type of economy. Greed is a very human thing anyways. The possibly that another intelligent life form has also developed that vice is slim to none.
I don't believe so. Any simulation -- even a perfect one -- will require energy. And more energy means more simulation. So unless all those aliens have completely forgotten about the real world, they will always be looking farther and farther afield to gather new energy sources.
Uncle Ben
I love your rice. That dirty rice mix bro. That dirty 🍚
That percentage was much higher than I assumed. Planets are tiny and orbit at relatively enormous distances. So I thought that the chance of seeing one transit its star given a random angle of view was horrible. Ironically, I found this video uplifting.
They need like and love buttons because this was amazing. I never considered magnetic fields gor galaxies, and the orbital orientation is such a simple and interesting limitation to our count of exoplanets that I'm intrigued!
It's nice to get a different "view" on things.
3:42 Today I leaner that Van Gogh's "Starry Night" was just the magnetic field of a galaxy.
I sometimes try to imagine the ecosystem of a distant planet, I don't know if it'd be as bizarre as SCI-FI media depicts, but it's very possible that evolution happened fairly different than earth, heck, maybe life there stayed unchanged, it's awesome to wonder about.
That galactic magnetic field illustration looks like a Van Gogh painting.
Im not sure you emphasized how important those papers are
How far away could we pick out our own radio signals if we were looking for them with our biggest radio telescopes? IE How far away could we spot us by our radio signals?
Myles Bishop One thing to account for is how the signals would weaken as the traveled away form the Earth.
Last I heard, we couldn't detect earth quantities/intensities of radio waves further out than our own solar system. But picking up "something" rather coherent signals is much easier, of course.
Would be WAAAY less than 200 years. The first radio broadcast was in 1906. Anything before that was too small to be detectable, and even that broadcast probably can't be detected by other solar systems. You don't get a strong pressure of signals until Television broadcasts became a regular occurrence in the 30s. So that's about 87 years, except we're already quickly moving away from radio signal broadcasting even now. By the time we hit a century, we might be all the way back to pre-1930s level, and eventually we may end up settling down to 1906 levels as everything switches to satellite/cable/wifi.
That's not much time left for aliens to notice us.
z beeblebrox on top of that, we'd have to acount for the scrambling that would occur as the signals pass through the solar system.
Imagine if aliens are wondering if we can see them while they look for us, like a cosmic Escher drawing.
this is the only guy I enjoy watching on scishow. get rid of all those other wannabes.
The title in the thumbnail sounds like the despondent rhetorical question of a SETI researcher arriving at the final stage of a psychologically-crumbling existential crisis.
"Now we know a little more about whether they'd see us... [they wouldn't. we're forever alone.]"
Someone from wardrobe should be written up. Hank's collar was tweaked that whole video
Last time you discussed a near future method of boosting telescopes, enough for direct imaging, gravitational lensing with the sun.
The transit method is very primitive the James web telescope will allow us to see these "hidden planets" even if we assume that alien civilizations take 1,000 times longer to go from Kepler to James web style telescopes than the odds we would catch them while they are in this "partially blind" faze would still be minuscule...
Hank green should host all of the pbs episodes lol
Your hair always gets me. I cut my own hair, and I don't get those random hair puffs. That being said, did scientists really think that gravity would change over time?
What about radio and tv waves? How far out are they?
Astronomers come up with some of the most profound solutions. I still have to look at the back of the book to make sure my answers are correct.
EvE Online is doing this with project discovery.
Aliens probably know so much about the universe that they know the past present and future of every point in the universe without ever having to go there.
Looking at distance stars; we are looking in the past.we need an epiphany to learn how to look at stars and other planets in real time
They probably could...and then they see some of us eating detergent...and then leave us alone.
3:44 undiscovered Van Gogh!
How far into space would you have to go before these other exoplanets lined up to see a transit?
THANK.YOU.!
What if "Aliens" are nothing like us? Yet, we keep looking for earth-like planets.
We can only look for life on earth like planets because that is Our only reference point. Everyone knows alien life could probably evolve under different circumstances but you can't search for something if you don't know what you're looking for.
I like that Earth is hidden and not easy to find.
Christopher Nolan, are you watching? I expect a science accurate blockbuster about us being found by aliens, soon. Thanks!
Sure! I just saw Us at the movies last Friday.
Duh, they have eyes
they might not. we don't know how aliens will look.
when it comes to aliens, no assumptions.
Virus 👏👏👏
Virus its racist to assume someone is illegal based on their looks.
Capability of detecting light should be by default one of the earliest features in the evolutionary development for any life form.
Maybe. Or perhaps it is isn't necessary and they use some sort of motion sensing type sonar in order to detect predators/prey, similar to many animals on earth. Or, perhaps they see a different part of the light spectrum and only can see ultraviolet light.
Path of the sun in the sky crosses the line of the milky way, so we are orthogonal to the galaxy plane and therefore ... You get it
I think the Drake equation should incorporate the fraction of exoplanets that would be in the right position to detect Earth by the transit method
I have a question - is it possible that there could be other planets in our solar system that we just haven't spotted yet? Or what is the likelihood of there being another planet amongst the inner planets that we for whatever reason just didn't notice?
If galactic magnetic fields cluster in the same places as dark matter does, maybe dark matter could be interacting with large scale magnetic fields.
*The Earth is lonely and looking for a fellow life partner.*
and yet, despite the low stats, we've found lots of planets. The same would go for others -- there would be plenty of other planets that could see us, if they looked.
What if they see us but we don't see them? Since we are pretty much looking into the past when we look at planets because light takes time to travel, they might already be some advanced species so near but yet so far. Then never know if we exist or not as they too will look into the past to some degree to se use.
Only way around this is possibly black holes, or long distance quantum teleport which is the only experimental possible way of transferring data where the speed is much greater than light.
I believe that it would be easy for aliens to detect us when they're near our solar system as we're emitting so much radio waves from our planet.
how fascinating!
light can also be affected by gravity not just magnetic field so i think they had to make some adjustments when they were measuring the light
More likely to find us using the 100 years of radio waves!
Why are maps of the universe stretched and not a round ball?
I think to find the chance that an alien species would find us by transit would also need to factor in the chance that said civilization was at a similar level of interstellar observation as we are, since less advanced or much more advanced species would most likely employ other methods, no?
How do we know those distant galaxies are not simply reflections of closer galaxies or artifacts of refracted light from gravitational anomaly?
hey the technique with which astronomers study is confusing ! ,light interacting with magnetic field ??how in the world are they distorted ?
I suppose that if they're advanced enough, they could position listening outposts outside of their solar system or on other planets within their solar system. Or maybe we could bring a 360 degree sensor array into orbit around our own sun so we would only miss the spots behind our sun. I don't know if that's possible with space debree flying around though.
We always assume that extra terrestrial life is vastly more advanced than us but what if they're just as advanced as us
If Aliens have not discovered us, it means that their technological progress is about the same level as us or probably even lower level then us.
So it is considered good news because as of now, no Aliens are more advanced then us.
Chances are we get to exist here because we got lucky being aligned like this....
Wouldn't the Solar System be a giant glowing fireball, at least as far as radio waves are concerned?
If we had better telescopes we could see the star's changes of luminosity caused by light reflected from the planet (similar to how we see the Moon).
Aliens can see us ... But they see no inteligence on earth so they have moved on ... 👽
I wonder how hidden we are? Like is it possible were basically camouflaged compared to other planets
Yay! Hank!
Well we are heading in the right direction with looking at magnetic fields. Now we just need to dispel the inanity of gravity holding the universe together and we will be on our way to understanding what is going on.
What are the techniques possible to detect exoplanets not involving transit?
They'll just come to help out. Everything will be free! If you have nothing to hide you have nothing to fear.
So a five minutes video to answer the question "can aliens see us?" with "uhh...probably not."
Do you think aliens would be able to detect the massive EMP bursts from when we set off nukes? Would those just be like massive jumpscares for interstellar radio listeners?
.....OK? Does anyone else in the class have an answer?
I'd say if aliens ever try looking for us, their best bet might be to look at our radio waves and whatnot that our satellites and technology give off
Another issue I havnt heard mentioned on the topic of aliens is that when we look at these exoplantes is that They are So far away that if they are more than 200,000 LYs away they wouldn't even see human life
Amber Smith so? complex life has existed on earth for hundreds of millions of years. Any aliens wanting to answer “is life unique to our planet” would be thrilled to see earth even if they’re seeing it hundreds of millions of years ago.
Just find the hottest point in a star system, if that's not in the center, you know you find a civilization.
Do galaxies magnetic fields rotate once in a while like the earth's magnetic field does?
The question should be, "Did aliens look, see us running around killing each other, then leave
Alot of iron is pinning at a god forsaken speed and is creating gravity. Gravity is something that keeps things together, thats why we have galaxies.
How far away are these supposed Earth-like exoplanets? I didn't see a specific distance.
So if you predict 10 planets, you should predict their possible locations, why not just send the signals towards those stars?
attack because they’re thousand of light years and and humans will be extinct by the time we get a response (if we even could get one) so there’s no point really.
3500 that we can SEE. Imagine how many we cannot..
What about our radio waves? I always wondered if SETI was sensitive enough to see radio transmissions from other worlds.
Would aliens be able to see our radio signal. Wouldn't it be too weak to see a few light years away?
Would aliens be able to see how messed up this guy's collar is and would they be able to fix it?
How about the wobble of a star from the gravitational pull of it's orbiting planets?
That's a good method too, but it works best for heavy planets orbiting very close to their stars. Smaller planets farther out (like Earth) won't have a distinguishable effect.
Little did we know the Covenant have been watching us in the dark for far too long...
Human Logic < Alien Logic
Can the wobble method not detect earth sized planets?
I would like to know how they measure the magnetic fields of galaxy's.
I doubt aliens with the ability for intergalactic space travel would use the same technology as us very minimally technologically advanced organisms.
Of course they see us, they're just staying away from such a violent planet. Would you go to a planet that has billions of violent aliens that are destroying there own planet and treating each other in such violent and horrific ways? Now imagine those aliens sending messages to space inviting you to make contact with them and come to there planet 😂😂
So is the first percentage he gave true in reverse? Do we only have a 2.5% chance of seeing a planet transit around any given star? If so there's a lot of planets out there we haven't seen! Also I wonder if they've moved Kepler to observe other transit angles we can't view from earth? I realize we couldn't confirm its findings, but it would give us a better idea about what we can't observe ourselves