“Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying.” ― Arthur C. Clarke

Lost colony of Roanoke by Lemmino

You have to react to Extraordinary Until Proven Otherwise by LEMMiNO

They can tell what gasses are on other planets by the color, vibrations and such. All gasses have a unique signature no matter where it's from.

5:39 RIP Arecibo Observatory, which sadly collapsed at the beginning of the month.

Watch the lost colony of roanoke by lemino

Just wanted to take a moment to shout out Luka for 100,000 subscribers! Congrats all the way from San Antonio, Texas!

There is a theory that humans are the FIRST intelligent life.

I love how diverse your interests are Thurston. It makes sure your vids are always interesting.

Lemmino The Battle of Los Angeles, I truly do recommend bro...

The way they know what gases a planet’s atmosphere is made of us called spectroscopy. If you shine a light at a glass prism, you’ll get a rainbow out. If you shine a light at an atmosphere, you’ll get a rainbow but with certain colors (frequencies) of light missing because that light is absorbed by the gases. Which specific frequencies are absorbed is related to the types of atoms in the atmosphere. So you get a “signature” that tells you, based on the light reflected from this planet, it’s got nitrogen and hydrogen and methane in it, versus a different planet which would absorb different frequencies of light.

The observatory in Puerto Rico is gone😪

FYI, the “LEMMiNO” channel used to be call “Top10Memes.” He has had quite a transformation over the past 6 years.

Lemino: explains they know what a planet has by using the spectrum of light passing through its atmosphere Luka three seconds later: how do they know what the planets have??

Just discovered this channel. I started watching lemmino like 3 years ago, he is class. But I love your commentary. It's not excessively intrusive, and you seem like a really humble lad. Most of your musings are on point and I feel that you really relate to us. Keep doing a great job!

Don't say you can't wrap your head around it... Look into it.... And if u still can't understand it, then say u can't wrap ur head around it.

Loving the Lemmino reactions you put me on to him and I’ve been checking out a lot of his videos on my own you should keep it up!

Love your channel. Congrats on 100k!!

Take an Astronomy course if/when you go to uni or find one online. Learning how they know all this shit is mind blowing in itself.

Here is my list of recommended videos from LEMMiNO: "The Lost Colony of Roanoke" "The Universal S" "The Battle of Los Angeles" "The Mandela Effect: A Critical Analysis" "Artificial Intelligence" "The Eight Spiders" "The Dyatlov Pass Case" "The Dark Side of the Web" "Top 10 Facts - War" "Top 10 Facts - World War II" "Top 10 Facts - Football" "Top 10 Facts - Music" "Top 10 Facts - Money" "Top 10 Facts - 2014" "Top 10 Facts - 2015" "Top 10 Facts - 2016" "Top 10 Facts - 2017" "Top 10 Facts - Unsolved Mysteries [Part 1]" "Top 10 Facts - Unsolved Mysteries [Part 2]" "Top 10 Facts - Space [Part 1]" "Top 10 Facts - Space [Part 2]" "Top 10 Facts - Space [Part 3]" "Top 10 Facts - Space [Part 4]" "Top 10 Facts - Space [Part 5]" "Top 10 Facts - Space [Part 6]" "Top 10 Facts - Space [Part 7]" "Top 10 Facts - Space [Part 8]" "Top 10 Facts [Part 1]" "Top 10 Facts [Part 2]" "Top 10 Facts [Part 3]" "Top 10 Facts [Part 4]"

Another thing to keep in mind is that we are looking into the past when we look out at space. Perhaps there are, currently, other lifeforms out there. We just haven't been able to see them because we are looking at their pre-dinosaur age.

I'd suggest some of Lost in the Pond's videos. I think you'd enjoy them as it compares Britain and the US. I'd start with his weather videos, particularly about rain and the cold. Those ones are "5 states with way more rain than Britain" and "5 states with way colder winters than Britain."

The radio signal (LGM-1) at the beginning had a pulse that repeated every 1.33 seconds. Our radio and television broadcasts reach space. Those do not constitute an attempt to attract the attention of intelligent extraterrestrial life.

Love your video, I've been binging for a few days since I found your channel.

I’ve been waiting for this one!

If you haven't seen it, the 1997 movie Contact with Jodie Foster and Matthew McConaughey imagines what it might be like to find an alien signal. Worth a watch.

I'm doing research looking for life on Europa using Raman spectroscopy. Spectroscopy is how the composition of things is usually determined. Congrats on the success, been watching since the early NFL videos.

Antony Hewish and his colleague Martin Ryle won the Nobel prize for Jocelyn Bell`s discovery. Bell was ignored, preumably because being a womn was considered unimportant.

Keep in mind, at around 3:40 Lemmino is talking about unintentional radio transmissions.(radio, TV, etc.) I'm not sure how much actual messaging we transmit, but even then, it just hasn't had enough time to make it very far. (cosmically speaking) Voyager (1?) has a cool gold plaque we stuffed with information about our appearance, our location in space, and even a handful of songs. Can you imagine being an alien civilization figuring out how to playback humanity's songs? I can't fathom an event that would be more impactful, aside from _actually meeting_ said aliens.

These types of video's by LEMMiNO are why I have existential crisis'

Really enjoyed this glimpse into our world.

I’ve never been so early. And congrats on 100k!

I love your love for these science videos!

Love your channel keep it Up dude

Yours is the only reaction channel I follow. Glad to see your channel is quickly growing. Stay curious, m'dude.

Hey man, love your videos and seeing you learn new things. I wanted to give you some ideas that I really think you would be interested in. 1. The Casscadia Earthquake- This is the real “big one” that will hit the US and cause tens of thousands of lives. San Andreas gets all the attention, but this one is a far larger and more destructive fault line. Portland, Seattle and Vancouver will all be destroyed and a massive tsunami will hit the west cost. You will be truly blown away by the destruction this will cause. When it goes, it will most likely be the worst natural disaster in US history but all one of the worst earthquakes in world history. 2. The 1992 Amsterdam plane crash- this was a plan that crashed directly into an apartment building in Amsterdam killing many people. This story is amazing to learn about. 3. You should look up footage of tornadoes from inside peoples homes. Some of the most heart wrenching but interesting stuff I have seen about tornadoes on KZfaq. The one linked below is the best and a must to see, and all in the video were unharmed. It really shows you what ist like to live through one. Casscadia Earthquake- kzfaq.info/get/bejne/gLhda7OLxNSnpnk.html Amsterdam Plane Crash- kzfaq.info/get/bejne/fZyYpKx-yajQn4k.html Tornado Hits House- kzfaq.info/get/bejne/rOCUiaefxryyfGw.html

You should react to the 15 emptiest parts of the United States by geography king, it is a great video.

Douglas Adams, "The Hitchhiker's Guide to the Galaxy", published in 1979. “Far out in the uncharted backwaters of the unfashionable end of the western spiral arm of the Galaxy lies a small unregarded yellow sun. Orbiting this at a distance of roughly ninety-two million miles is an utterly insignificant little blue green planet whose ape-descended life forms are so amazingly primitive that they still think digital watches are a pretty neat idea.” “Space is big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space.” RIP Mr. Adams. You are missed.

I love how easily astonished you get at these types of things

Space videos gotta be the most interesting videos you upload for sure

I'll never forget the video when you annunciated Let.Me.Know. You had me rolling when the light bulb went off haha

Eyyyyyyy that’s my favorite video of his!

If a exoplanet passes in front of its parent stars we see the spectrum change giving us an idea as to the exoplanets atmosphere. Spectroscopy is a very neat thing. It can also tell us if an object is moving towards or away from us.

it's times like this that Valery Legasov (nuclear scientist who went to Chernobyl) comes to mind with this: "we are so focused on our search for truth, we fail to consider how few actually want us to find it" it's the same with SETI, scientists are so focused on looking for alien life, they fail to see how many people on earth don't want them to find it

You ask how they can know the composition of the atmosphere of exoplanets when he literally explained it 30sec earlier

Weird and interesting fact: the UN has an Office for Outer Space Affairs. Most of their job is to deal with Earth-centric space laws but they would probably be the agency that would be tapped to take care of any visiting extra-terrestrials.

To give you a brief answer for how scientists manage to find out the chemical compositions of exoplanet atmospheres many light years away: - Each chemical element/compound emits a unique wavelength when interacting with light (refer to 8:34), which acts kinda like a fingerprint. - When these wavelengths are scrutinized against potential confounding variables such as doppler shifts and physical obstructions, scientists can deduce at least the approximate chemical composition of atmospheres, even if they happen to be light years away.

Extraordinary until proven otherwise! 🙏

Geez ur growing unbelievably fast

16:36 If you can find it, I highly recommend The Farthest: Voyager In Space. It's an amazing PBS documentary about the voyager spacecraft and the golden record. Obviously doesn't have to be a reaction because well, a documentary is a lot different than a youtube video.

Greetings from Florida!

If someone hasn't yet mentioned it, we discover what stars and planets are composed of by using spectroscopy. When the light of cosmic bodies is broken into the electromagnetic spectrum, each element has a characteristic set of dark lines, obscured on the spectrum. Using filters for various elements, then running the light through a prism allows this analysis.

"You (Intelligent Life) are an aperture through which the universe is looking at and exploring itself." - Alan Watts

Very simple explanation here. EVERYTHING is constantly sending out waves.(like color, but also waves that can't be seen, think heat detective goggles, the simply thing of being hot sends out waves that the goggles can catch). We know what gives off what color. We catch those waves and read them. We know what has send them. I really want to stress that there is so much information flying around that we as humans can not detect.

The scientists who built the voyagers included a record by chuck berry i case alien life finds it. My guess is that the first transmission we get will be “send more Chuck Berry. That joke was from Saturday night live. When voyager passed Jupiter chuck berry himself came and entertained the engineers and scientists. A grand time was had by all.

9:15 To answer your question, they detect planets essentially by measuring starlight, and waiting for it to dim, which would indicate something has passed in front of it. They can determine how large it is, where it is etc from how long it takes to pass, how much it dims, etc. However, using VERY good sensors, we are able to pick up the actual dimmed light, which would have passed through the atmosphere of the exoplanet. Chemicals have an impact on the way light refracts through it, so if you look at an entire spectrum of light, you can tell which elements and particles have interacted with that light to determine what they are. I also believe that they can detect certain types and levels of radiation emitted from the star, and, again, by picking up the dimmed light, can tell which radioactive particles are missing, which would also indicate a certain chemical makeup. It's all incredibly fascinating shit.

The way they find out what makes up the chemical structure of a planet is by using spectroscopy, other words send a bunch of different wave-length lights at a planet and see what comes back. And that will tell them what that planet has on it... Just fun fyi

The universe is extremely young; 13.8 billion years old and the Earth is one third of that age. Even if intelligent life is common, we may be one of the first to emerge simply due to how young the universe is.

We still have sent radio stuff to only a small part of our Galaxy, if I remember correctly

There is a really interesting television show called "How the Universe works" that talks about various aspects of space. Each show has a different topic like black holes, pulsar stars, and more. It has several really smart people like astrophysicists and such talk while they show different things, and they're not dry and boring, so it's pretty fun to watch. Just a suggestion if you're interested in space.

They find out the chemical composition of distant planets by looking at the spectrum of light reflecting of the planet, they use telescopes and spectrometry to get the results a spectrometer refract and splits light into thin lines and it's individual colours, each element has a curtain pattern of lines of light. For example hydrogen has many red lines as the wavelengths of light are very big and therefore appear red. For very distant planet this becomes harder as red shift takes places this is when the wavelength of the light stretches creating a shift in the spectrum of colours that we see, for example we could be looking at an element like helium which appears blue through a spectrometer may become red'er as it travels a long way. Furthermore there are three types of spectra we can use, these are emmisions, adsorption and continuous. Hope I answered your question.

It is explained in the video the chemical make up of a planet`s atmosphere can be ascertained by spectral analysis of it`s stars light as it passes through it.

I recommend the dyatlov pass case it's a great video of his

Could you react to “72 Hours With Strangers Who Have Seen Aliens” by Yes Theory

We haven't been trying to signal possible aliens, just that our radio and television signals have been leaking into space as we use them for ourselves for the last 100 years.

I’d recommend checking out a guy by the name of Jacob Geller. His videos more often than not focus on video games, but he talks about a wide myriad of thought provoking, almost philosophical ideas. Another good one to check out in a similar vein would be Exurb1a, who also does incredibly thought-provoking content, though not focusing on things like games, like Jacob does. Instead his videos are more about ideas and stories in of themselves, and they’re so intriguing. For Jacob Geller, i’d recommend starting with “The Quiet Sadness Of Mario Galaxy” or “Cities Without People”. And for Exurb1a, his videos titled “Let’s Build a Time Machine With Pickles And Sadness”, and “You Will Never Do Anything Remarkable”

Luka.. IM BEGGING YOU please react to the lost colony of Roanoke by LEMiNO

9:06 If you're interested in this stuff, watch _The Cosmos,_ I'm sure its on one the streaming services. It goes over how a lot of the science works in layman's terms. The recent re-boot with Neil deGrasse Tyson is very good, as is the original with Carl Sagan.

Holy smokes, you're up to 107k subscribers 👍🏻

Luka one way they find certain elements is just by looking at the planet and it’s color + it’s size and location

Our man over here is getting 1K followers a day

The radio telescope in Puerto Rico is being demolished. :’(

Think of our examination of deep space more like an investigation. Since deep space objects are so ridiculously far away, when we examine them with instrumentation, we're not seeing them in the present. It's more like we're looking at the surveillance footage after the fact, to see what happened. It's actually really easy if you think about it like this; if something is one light-year away from us, we'll see it as it was one year ago. If it's fifty light-years away, we're seeing how and where it was fifty years ago. Think of light (and other radio waves) as a constant stream of little notes, or tiny little pieces of mail, that a star or other object is emitting. It emits these constantly, in all directions (usually). These just keep on going and going until they hit something and are either absorbed or deflected onto a different path. If they travel for long enough, they start to stretch out a bit, like wear and tear on a piece of mail. Eventually, some of these will land on our detectors, and we can "read" the "mail" to get some information. Looking at the wavelength is helpful, because it shows which parts of the spectrum were absorbed and to what level. This helps us figure out what might be doing the absorbing. It's kind of similar to throwing a bag of flour onto the invisible man. He's technically still invisible, but you can clearly make out his rough features because the flour itself is visible. In space, radio waves act in a similar manner, or rather, reveal things in a similar way. We can also figure out that things are in certain spots when they go in front of other things that we are observing. I'm sure my explanation isn't the greatest, and may contain some level of errancy, but hopefully that helps people visualize the general process.

I think if you took a university level intro course in chemistry and spent hours a week in lab with a spectrometer, it would be fairly clear how they deduce the chemical makeup of these extrasolar bodies. It's been years since I have but I remember being amazed at how a spectrometer worked, lol.

"They" aren't broadcasting so that Aliens can find us, we as a civilization are broadcasting to ourselves (TV, Radio) and that could be detected by intelligent life in about a 150 light year radius now.

You mentioned being blown away that we can detect the composition of planets etc out there and thought you might enjoy a video by SciShow Space called: The Impossible Element Hiding in the Sun. It talks about the first element we managed to discover somewhere other than our own planet. It's a bit short for a reaction video but you could just watch it in your free time if you're interested(:

Luka, he isn't saying that we've spent over 100 years attempting to attract alien attention to us. He is saying we've spent the last 100 years emitting radio waves into space. As in, radio broadcast. Television broadcasts, etc. Those things don't just form a fog-like blanket that hovers around the surface of the earth and covers the whole sphere. radio waves are emitted in all directions. So yes, if you were chilling on the moon, whether we like it or not, you will receive broadcasts from earth if you are looking to tune in.

Extraordinary Until Proven Otherwise by LEMMiNO would be a great one to do

Mans cranking out videos. 2018 Ngolo Kanye work rate.

Another 5k subscribers in about a week. Lets get 110k. Happy New Year.

The Battle of Midway, Told from the Japanese perspective. It's by the same guy that did the pearl harbor video. It is three parts, though.

When they say "Habitable Zone" I always think how do they know that? As far as we know life can exist in space itself and we're using our own standards and the way life evolved on Earth to find life, which it's unlikely all life in the universe is based upon the same ways we get life (as he said, not all life needs to be carbon based. If you think about it, not all life needs water either, we just don't know.) Also when they mention lack of evidence (such as the probes), what if we are in fact the most advanced civilization out there right now? Or not far behind the leading civilization in space?

There is a video called "Chapter 2: Alien Life" by the same people who did "A journey to the end of time" and it is incredibly well done and looks like it burned this mans graphics card. it talks about possible aliens and how they might look like and how different they could be.

Kurz has a great video on the “Dyson Sphere”. It goes more in-depth about it, it probably will get blocked but its a good video.

I would suggest reacting to kings and generals videos on Ancient Rome!

Space. Fascinating but fucking scary as shit.

It interesting how you were asking, with our technology and advancements how can we be so hostile towards each other. When it is those hostilities that have driven much of those advancements. War breeds advancement for better or worse.

by the way love the science reactions do more do one on UFOS maybe?

So, my thoughts on ET transmissions goes something like this. Let's say (for argument's sake) that mars was exactly like Earth in every conceivable way, only 200 years ahead of us. If Earthlings were in the year 1800, the martians would be broadcasting Radio signals into space as if they were in the 2000s, but we, having no knowledge of radio waves, would have absolutely no idea that surrounding us would be constant information. Cut to our actual present, how do we know we aren't surrounded by something we simply cannot detect.

There was a spacex clip in there. I will get him to react to them eventually.

He is going to react to jonny arnett After 43 days of this if he did not say he was going to do it. It would be day 59 or 60 I can’t remember and 7th comment let’s go

5:40 btw, this telescope fell like a month ago

You should react too “Why finding alien life would mean our doom. The Great Filter”!!

I took an astronomy class and unfortunately forgot most of the important shit

At this point you gotta watch em all bruh

My guy thurston

Stop saying, "this is probably a stupid question." Remaining ignorant is stupid. Seeking knowledge or a simple understanding is never stupid.

I don't think we will ever find intelligent life beyond Earth.

Vsauce has some awesome videos in that direction too :)

You gotta do his Dyatlov Pass