Meanwhile many people still believe the Earth is flat.

@starbog1

5 жыл бұрын

One day it'll stop completely being serious.

@animekyu3602

5 жыл бұрын

Lol

@TheMitchZone

5 жыл бұрын

Lmfao 😆

@JuanLopez-zu4od

5 жыл бұрын

I thought it was a square

@ScottishPEACEguy

5 жыл бұрын

I understand how big out there is and how stranded we are, maybe even stranded from nothing, I'm sure we are another races lab experiment/creation, that just my opinion (it will likely change, or not), it could be a lie how big it is aswell, but I panic alot because of it all, the moon gives me the heebee jeebeez, there are alot of things about that thing that don't add up to the rest of the observable university, like the crators and that it never spins on its own axis, all most like it's there to observe us.

We know about all of this stuff because of our space telescopes like Hubble, and math equations that we’ve gathered from our observations.

@therepublicofuniland4512

5 жыл бұрын

Correct

@EbefrenRevo

5 жыл бұрын

Yeah we know "stuff"

@Lumberjack_king

3 жыл бұрын

Yes exactly

@daviditachi1195

3 жыл бұрын

Also cmb

@jan_phd

Жыл бұрын

And now we have the James Webb Space Telescope, which allows to see 8 times deeper than the Hubble.

"How do we know all this?" All that can be explained when you figure out what is light. That's a good starting point.

@pierreo33

4 жыл бұрын

no need to be so smug

“The universe is a pretty big place. If it's just us, seems like an awful waste of space.” - Carl Sagan.

@cyanide3508

3 жыл бұрын

True

@rostev2195

3 жыл бұрын

True enough Sagan. But we've only learned how imposible, miraculous, and ridiculous it would be to find other intelligent life forms.

@dapurplepupchoco4328

3 жыл бұрын

I'm going to ruin the 19 likes >:)

@brandonflorida1092

Жыл бұрын

@@rostev2195 Why would it be impossible?

The odds that Earth is the only planet with life, let alone intelligent life, are so astronomically low that the existence of alien life is pretty much a given.

@xlixer7641

5 жыл бұрын

I bet theres life in all the corners of our galaxy even.. But how would we know? We cant even get past our own moon

@benichsthepheonix4418

5 жыл бұрын

Bret Reed whenever people think of aliens they think of big giant space ships and stuff, but as far we know there could be another planet millions of miles always that is at the same rate we are and have the same technology so do and we would never know

@jpex6778

5 жыл бұрын

There must be so many species out there also discovering the universe like ourself. Insanity out of our comprehension. We need to grow and leave our Planet(a part of it) and live on other planets and colonize the universe we are in to. It is great because we are getting faster and faster to know stuff but to leave our own planet is difficult. We are at the start of exploration. It is like the first fish who wanted to get on land. It is possible but it takes so much time to make the first step o.O after that it goes quicker and quicker just like our technology is exploding.

@Stankonia3k

5 жыл бұрын

To add an additional perspective, there could have been species somewhere in our galaxy or the greater universe that have come and perished as well. All we have to do is look at the history of our own planet. When thinking about contact with extraterrestrial life forms, we have to take into account not only whether it is intelligent, whether it is advanced but also whether or not it/they even exist(ed) long enough to make contact.

@waynelang7831

5 жыл бұрын

Bret Reed sometimes I wonder if there's intelligent life here on earth...

It is funny that in every single reaction video on this, the watchers cannot make the distinction between 'visible with the naked eye' and 'visible with big-ass telescopes' lol.

@SubterrelProspector

3 жыл бұрын

Horray for the U.S. Education system.

Watch Cosmos. It's on Netflix. It explains each scientific breakthrough and the history of the people who figured it out. Thousands of years of observations, discoveries and calculations have led us to knowing this, and it's important that everyone knows the level of genius we have achieved so far so that they help us build on it in future. We're all on this mote of dust suspended in a sun beam together, videos like this should make you want to act more like that.

@kiko0311

5 жыл бұрын

The entire original series is here on KZread. RIP Carl Sagan

Moral of the story of the universe to humans, You can look but you can't touch.

I am sure there are millions of Alien species wich will never ever have the chance knowing of each others existence. But also some will have met each other

@wolfmanflame12

5 жыл бұрын

Imagine that if there are aliens outside the observable universe, they will never know Earth, let alone the entire Galaxy exists.

@Stevesrssrssrs

5 жыл бұрын

Or maybe they're all long extinct! I personally believe they're constantly watching us like some zoo, taking notes, a billion-year science experiment!!

@goodstudent4270

5 жыл бұрын

@@Stevesrssrssrs if they have that much technology I think that they won't care about us since we are very underdeveloped

@Stevesrssrssrs

5 жыл бұрын

@Berserker Fate There's a theory, on the fringe, but still very possible that aliens from thousands of years ago combined their DNA with a hominid species, the most advanced species on Earth, but still stupid compared to us! That would explain why we basically did nothing for hundreds of thousands of years, and then suddenly rocketed out of cave man-mode to the advanced beings we are today!! If they took part in making us, then no matter how advanced they are they would want to monitor their experiment and see if it's a success or a failure that needs to be ended!! A little crazy, but the men who discovered DNA, at least one of them, for decades afterwards, said something along the lines of we would've needed more than a million years more on Earth before our DNA would've been as evolved as it is, and he also believed that theory!! Hell, for all I know, he started it. If they had nothing to do with our creation then I would agree with you, but if they did, they might want to check it out!

@shikharchawla1605

4 жыл бұрын

@@wolfmanflame12 then humans can rule the entire universe.

What perhaps even crazier is how unbelievably small things can get. We are like observable universes to the quantum realm.

@Simkets

6 ай бұрын

Kurzgesagt made a video about that. It's called "The smallest to the largest"

That is one of my favourite videos! Was so excited watching your reaction, it's so mind blowing.

In every reaction to this video, both young and old people, ask "How do we know this ?" Well there are theese two things that´s been around since the early 17th century. The telescope and the astronomer. Since then we have watched the sky, making calculations and maping stars. For the last 100 or so years the telescope has improved greatly and now we send them to space to get even better pictures. And computers also helps allot. There´s also a special kind of star called a Cepheid en.wikipedia.org/wiki/Cepheid_variable that help us caculate the distance so we can make a map of the universe.

I liked the point she was making. There's no way we are capable of being able to handle knowing (everything). I think about that too. Is it a revelation or a burden to know everything? We're limited in so many ways

Out of all reaction vid to that vid, you guys had the most interesting post-reaction discussions.

Scientists spend hundreds of years to discover and observe the stars and universe in it’s entirety: Karen’s: “ the eart is flat!!!”

I love this documentary. Really puts life into perspective. I think it's stupid & ignorant to believe that there's no other life out there

@WelshWidgetMan2O1O

5 жыл бұрын

IMO it seems rather arrogant to think there wouldn't be other life out there somewhere. WE'RE here so why couldn't someone else be? Oddly, there are those who don't think that!

@WelshWidgetMan2O1O

5 жыл бұрын

@Berserker Fate Speciesism would explain why some people think the way they do.

@shikharchawla1605

4 жыл бұрын

There is just 1 question "Are We Alone or Not?"

@deegee6863

2 жыл бұрын

@@WelshWidgetMan2O1O Other life is massively possible. However, there may not be space faring species in the galaxy as there is the possibility we are the first to reach sentience and that won't be a disproven theory until aliens park their space ships on the lawn.

Im pretty confident that there is Life on other Planets. A lot of them could just be at the same technological stage as us, further ahead or behind us and sooner or later we will come across Alien lifeforms wether we want to or not.

@cyanide3508

3 жыл бұрын

There is next to no way there isn't intelligent life out there.

I can't imagine there NOT being other life in the universe (other than us). After all, we exist in this universe so why is it hard for people to imagine other life could as well? The video shows how big the 'known' observable universe is but doesn't address other possibilities like a Multiverse, which is an idea that is rapidly gaining scientific support due to having a better understanding of how such a things could be possible. If you think your brain hurts by wrapping your head around the idea of an infinite universe, there are likely many aspects of "life" we humans will probably never be able to comprehend. Consider how 50 years ago the original Star Trek was considered absolute science fiction, yet today how many aspects of that science-fiction has transformed into science-fact? Many of the fictional aspects of that show are now quite real. Technology like the flip-style communicators originally used in the show would later become a real thing in the 1990's through early generation cellular-phone technology. Lt Uhura's wireless earpiece was originally just a fake prop made from a honey dipper but would later become what we know today as Bluetooth technology. The small, flat data storage devices used in the show would also become a reality by way of thumb/flash drives. I read where a medical 'tricorder' has been developed, which combines numerous medical devices into a single handheld tool. Modern-day smartphones are another such advancement by cramming a shitload of features with loads of sensors into a small handheld device - essentially giving you a single do-everything device in your pocket. The futuristic 'pads' used in Star Trek would also become real life products which are also currently used today. In fact, much of the sci-fi technology in the original Star Trek has been put to shame by some of the real devices we use today. Human beings existed for thousands of years with almost no major advancements in the way they lived. Then all of a sudden humans went from living in caves with no spoken language to splitting into numerous cultures, all very different from the other yet unique. A mere 125 years ago we couldn't fly, yet today we fly every single day in complete comfort in airships larger than yout home, and with every comfort one could ask for. We once traveled the oceans using small rat-infested wooden vessels and the disease contained within them gave travelers a 50/50 chance of surviving their journey. Simple storms routinely sank and killed all those onboard. Today the current largest ocean cruise vessel is Royal Caribbean's Symphony of the Seas which carries more than 6,600 passengers offering amenities of an entire city of stores, shops and services. People from long ago would be utterly astounded to see the advancements human beings have made. Human advancements absolutely exploded over the past one hundred years alone, yet prior to that time humans drudged along for thousands of years living the same shitty lives, yet all of a sudden something happened that leapfrogged our species from living dreary lives to that of luxury. The same thing can happen again and it could be the next series of advancements that lets us figure out how to get around our current limitation of using RF waves (radio) to communicate over long distances or to travel at the speed of light or beyond. Just because we don't know how to do something today doesn't mean we won't figure it out tomorrow. There was a time when traveling faster than the speed of sound was thought to be absolutely impossible, yet we figured it out and can today travel several times that speed. It just takes a little time but from our perspective it seems like a long time when, in the grand scheme of the universe, it's nothing at all.

@tommatthews9126

5 жыл бұрын

Wow, that's a lot to take in but you're right. Humans went for a long time not really advancing much and then it seems out of nowhere in a couple hundred years time we went from riding on animals to flying. When you think about it there did seem to be a sudden explosion of knowledge and growth out of nowhere. Not sure if you're suggesting an outside influence but it does seem strange humans would go along for such a long period with little progress to being able to fly. Very weird.

@starbog1

5 жыл бұрын

It just took us a while to stop being judgemental with the impossible as much as we were two hundred years ago. Even today we can be, but not in "you're heretic" kind of way.

@RenegadeShepTheSpacer

5 жыл бұрын

Agreed. Well said.

@dallomarde5756

2 жыл бұрын

With universe ths big i don't think we're alone..it can't be it's impossible..even in just our Milky way galaxy there are 100 billions of stars..1 star makes 1 solar system and there are lots of planet in 1 solar system only ..and some stars are so enormous thn our sun maybe it can hold more thn 100 planet at once from its gravity.. imagine the planets one galaxy can hold thn..and there are about 2 trillions galaxies in our Observable universe only..now think about the whole universe..and I'm not talking about aliens only ..aliens can be in form of microorganisms or a primitive species..but I'm talking about intelligent civilization..i believe there are billions of civilization exist in the entire universe..and i also believe someday we will find them or they will find us but not everyone like it said in the video it's impossible for both of us because of the vastness of the universe.

U should react to STAR SIZE comparison 2 ..its a great video ☺

That moment when you think you're tall at 6 foot 4 but then you realize you're actually about as insignificant as a single atom is to the earth

Love these mind blowing kind of vids and of course my favorite you tube couples reaction to them...oh and it took a bit over 3 days to get to the moon back in the 60s....the moon landing is one of my earliest childhood memories and it would be pretty cool if I live long enough to see a Mars landing too.

Regarding "infinity," a lot of people misunderstand it. There actually can be different size infinities. And there can be infinity between two fixed locations. For example, the number 1 and the number 2. You can break down the numbers between them into decimals. Start from 1 and add half the remaining distance to 2, you get 1.5. Now, add half the remaining distance again and you get 1.75. Keep adding half the distance over and over and over again. No matter how many times you do it, you will NEVER get to 2. Even though you know the start is 1 and the end is 2, there is an infinite amount of decimals between the two numbers. Space is infinite in the same way. There might be an "Edge" but there is an infinite amount of space between us and that edge.

@Spiritual_AJ01

5 жыл бұрын

The universe is problably like a sphere i dont think there is a edge

@Medic_Medulla

4 жыл бұрын

@@Spiritual_AJ01 nah m8 universe flat

I love the way yu guys think about it . God bless yu both .

"You shouldn't be overwhelmed by the size of the universe. Sure, its way huge, and that means that each of us is way, way small. But so what. That just makes us that more important. Because we're here. We're here and we can learn, and we can figure it out, and we can build and grow and make ourselves great. Don't feel tiny... feel gigantic." -- Neil deGrasse Tyson.

@sunryse9147

5 жыл бұрын

Nice

@mycroft16

5 жыл бұрын

I always tell people after they see videos like this that the fact that we've been able to sit on our little lump of rock and discover and understand all of this is truly amazing and that right there shouldn't make you feel small.

Hey guys, how are you? Great video

@jupiter9049

3 жыл бұрын

no

Age times the speed of light, of course, who didn't see that coming?!!

@cyanide3508

3 жыл бұрын

Logical

EARLYYYYYYY YAYYY LOVE THE VIDEO

6:44 We can see it with telescopes, but we can only see out the top and bottom of our galaxy--so it makes it tough to map everything. Looking through the disk of the galaxy has a ton of dust and is extremely hard to do. It blocks out a lot of the sky and you have to use huge arrays and do radio astronomy and stuff.... That was my major for my undergrad degree. That's why you'll see gaps in sky maps. We have two general directions we can look.

If the unirvirse was a cake and the slice that you are taking is the earth you wouldn't even see the slice that's just MINDBLOWING

For a trip to the moon, it takes about (now this time will very depending on flight profile) 4 - 5 days. Mars will take about 6 - 8 months.

You talk about traveling the speed of life? I would be happy if we can figure out cryostasis.

The video they are reacting to is the best video ever made

if i could go to Mars i would go instantly. To see the galaxy i would risk my life just to see that with my own eyes. After that death is ok.

Great vid

I can’t wait for the day you check out Loïc Nottet! Y’all gonna love him!

How do they know everything? They use CMBR (Cosmic Microware Background Radiation), physics and math. And trust me, they do know everything that's showen in this video.

But still we won't ever know much about outside the light-bulb... Just because those objects are outrunning the speed of light away from us. They are forever lost to us...

The infinite size idea comes into play when you think about what the universe is expanding into. Like, beyond the actual size of the universe which is already beyond the observable universe, what lies outside of that? That's where I think they bring up the infinite size, when they bring that in as part of the universe, beyond the farthest material or active energy.

It's pretty big I guess.

You 2 need to look at the Hubble deep field images.

@randomentertainment8927

4 жыл бұрын

They are incredible. It's unbelievable how insanely insignificant our little rock is.

This is why I find it fun when people ask "if there is aliens, why can't we make contact them?" Answer is two simple things: Time and space. If we just think about time first. Humanity has been around very short time. It's possible there was another sivilisation "near" us million years ago or there will be another one millions of years after humanity is gone. This video answered to ""space" question. Universe is just so huge place. Even if there was 1 000 different sivilisations even in observable universe, we can't "see" them. We can see their galaxy, but we can't see what is inside planets of their galaxy. For us to contact any other alien race, they should exist same tame with us and their homeplanet should be very near to us so we could see them with our teknology.

The more you think about the existence of the universe the more mind blowing it is. Even if the universe was even larger then we think it is.... where is the universe? Does it have an end? If the universe is expanding where is it expanding to? We once thought that the planet earth has to have an end, that it needs to end somewhere. Then we realized it's a globe and that if you go in one direction you will at some point get back to the place where you started. Is the universe also a globe? If so then what's around the globe? So many question that I will never get the answer to. The whole existence of everything is a huge mystery.

@etano1701

6 ай бұрын

maybe the entire universe is created inside a lab for an experiment

@Simkets

6 ай бұрын

@@etano1701 And where is the lab? Does it also exist on a planet? Is also the lab's planet in a Universe? Where is their universe? I'm all up for that theory, but that sadly doesn't answer the question at all, it just shifts the focus of the question now on the lab, and the existence of the world and universe the lab is located in.

I watch many of these videos looking to see the awe that I shared as a kid, but there's a common question I don't understand. Many people say how do they know this? I'm really struck by how many people don't know what astronomers do with those giant telescopes.

This tiny place in the total vastness of space, and we can't even get along on it

I think the flight you were asking about which involved two astronauts was the 1965 flight of Gemini VII. James Lovell and Frank Borman spent 14 days in orbit, which was the longest duration space flight at that time. Lovell jokingly referred to it as "Two weeks in a garbage can." Since then, astronauts have undertaken much longer flights - more than a year aboard the Mir space station and nearly a year aboard the International Space Station.

This guy is refreshingly up to speed on basic knowledge and scientific literacy. He knows Voyager is almost out of power and he immediately recognizes the concept of observable universe vs "entire" universe" and he quickly picks up an understands the concept of some objects receding faster than the light from them can reach us. These two concepts are frequently misunderstood in reactions to this video. Well done guys!

Great reaction. 🙂👍

It takes about 9 months to get to mars, currently

we use the hubble telescope to see the far in space

Imagine what could have already been accomplished if we weren't busy killing each other.

How do we know all this? Radio Telescopes.

@p1ngh

Жыл бұрын

This isn’t 1800. This is 21st century now.

Awesome name from a fellow nick

99 percent of kids today, ages 15 to 20 have no clue, nor do they care.. We are all star children, everything you will ever see, comes from the Stars...my belief and hope is after death, we go back to join the universe some how.....

Fantastic reaction. Funny you should say "what if there are things that can jump from place to place". There are particles called "Gluons" that jump in and out of existence. They appear from nowhere, then they disappear again.

You guys ok? Been a year since you last posted

The universe is like a bubble, growing exponentially. Making it impossible for us to leave our system.

A 4 dimensional donut shape for our universe is one possibility.

The Hubble telescope. It opened to us the outmost reaches of the observable universe. Also mathematics.

all of this researches are happening just to find answer for a question which is : "Are we Alone or not?"

@TheLemzia

4 жыл бұрын

There is actually a Lot more to why we study Space. I, for instance, am more interested in Black Holes.

@cyanide3508

3 жыл бұрын

no way we're alone in the universe

please react on Voyager journey from 1977 to 2018 by maz

Basically if a civilization that resides in Andromeda is looking at The Milky Way. They are seeing the Milky Way 2.5 Million Years into the past. Same for us looking at Andromeda

If you guys haven't, you should watch "every space shuttle ever launched, in order" by nature video.

Check out some of the images from the James Webb Space Telescope. they blow my mind.

Imagine travelling all the way to laniakea supercluster on another galaxy and inside a random planet and cant find your way back to the right galaxy that the earth is located that would be totally a nightmare for whoever travelled that far.

Now scale the microscopic. Moving from the tip of your nose to the smallest sub-atomic particle, is similar to what we just saw... only getting smaller and smaller.

Look up quarks, they are one of the most mysterious particles in existence. As well as dark energy.

I’m watching a year old video ! 😂

React to the sizes of the stars, it is also mind boggling

Please react to; 1.The ocean is way deeper than what you think. 2.5 impossible things that happens in other planets. 3. The history of the world I guess

@vMufasa

5 жыл бұрын

The history of the world! such a great vid!

Yeah we like to study "stuff", so much "stuff" out there, more "stuff".

This is what can be seen by Radio and Optical telescopes. Looking at light billions of years old.

Voyager is that fast because of gravity assist maneuver from each planets. Which saves propellant and reduce expense. It would need another 175+ years for the planets to align again if NASA/JPL wants to send another spacecraft like the voyager.

Just to sort out some of your confusion, the size of the universe is actually finite but in practicality it's infinite. This is because the very space itself is expanding at a rate faster than the speed of light further out in the universe. Since nothing can travel faster than something that has no mass(light) it's impossible to ever actually reach those parts of space, no matter how long we travel, but space does end at some theoretical point.

And to consider you can also go the other way and zoom in. The universe is infinite both ways. From quarks to the observable universe is only the range we know up to now. But let's first manage to live together in peace on this planet.

We map out the distance of the furthest stars that's how we measure galaxies...

The closest planet is actually Venus, Mars is around double the distance. But Venus is hell, i mean it is just hell conditions there.

@themplar

4 жыл бұрын

Ehh. just looked it up. Distance to venus is162 million miles. Distance to mars is 140 million miles.

Scientist estimated it would take 6 months to get to mars and 6 months to get back when mars is closest

Uranus and Neptune are the planets that 'theoretically' have enough pressure to crusch the methane rich atmosphere's to diamond. Possibly on Jupiter and Saturn, although they are Hydrogen and Helium rich.

3 days to get to the moon traveling around 17000 mph .

Only thing flat earthers fear, Is sphere its self

It's impossible for there to be elements in the Universe that we don't know about, because of how atoms work and because of the fact that the laws of physics are the same everywhere in the universe. This was a great reaction though, I love seeing people speculate about the Universe.

@themplar

4 жыл бұрын

Well, we dont know what dark matter or dark energy is. And there actually is a study currently that suggest that the laws of physics are not the same throughout the universe. Now the scientist on this research think there must be a flaw in their data or math, so they dont expect their research to have correct results.

You should try the history of the entire world I guess by bill wurtz...

So I can explain how we know/discovered all of this! And I'll do it in "Physics for Poets" style. (Astronomers & Fellow Physicists: don't come for me, this is a rough explanation.) So, first a question: Why do you want new phones with cameras that have more megapixels? Same with telescopes - we all want better pictures! So every since the first telescope was invented 500ish years ago, people wanted something better. Galileo: "Look! Jupiter has 4 little moons around it!" Cassini: "Whoa! Saturn has this huge honking ring around it!" Later Generations: "Cool! But it's all fuzzy … let's try inventing better telescopes." Basic human stuff: the more we saw, the more we wanted to see it _better._ The next ingredient is Geometry. The Ancient Babylonians, 4000 years ago, had figured out (1) the Earth is a sphere; (2) the Earth's radius [i.e. how big the Earth is]; (3) that the moon was 30 Earths away, or "60 times the radius of the Earth. All with Geometry. And math: we actually have clay tablets from Ancient Babylon with some kid's math-homework on it! [The Ancient Babylonians were obsessed with the number 60. Religious significance, apparently.] We can use that same Geometry to figure out how large all of the planets' orbits are and how far away they are. And as we made better and better telescopes, we could take that same Geometry and apply it to those better images. And with that, we were now measuring how far away the stars are. The Sun is a pretty important thing, we can all agree. So, no surprise, people wanna know how the damn thing works! And how far away it is. But, see, once you know that, you can then compute how bright the Sun looks on Mars. And around Jupiter. And at Saturn. That same math and physics also lets us compute how bright each star looks close up. Well, once we figured out that the stars were just other suns. So, once we knew how the Sun works, we knew how _all stars_ work. And we were already measuring how far away the nearby ones were. And we can measure how bright they look _here_ on Earth. That's all you need to compute how bright each star is close up. And once you know how a star works, and how bright it is, guess what? You can calculate _how big the star is!_ Okay, so: the Geometry part, which we need to measure how far away a star is, only really works out about 6000-8000 light-years, if I remember correctly. I won't bore you with the math behind why unless you really wanna know. So how do we know about all that stuff *millions* of light-years away?!?!? Enter "The Ladder of Standard Candles" Remember how we all wanted to know how the Sun worked? And how that then told us how the stars work? Well, after watching lots of stars to _make sure we had our models right_, we started seeing behaviors that the Sun don't do. And some stars seemed to act in the same "different-from-everyone-else" ways. Back to the whiteboard - time to enhance the models about stars! Okay, great. We know more and more about stars … different kinds of stars even … the more and more we look out there in space with our telescopes, which we always want to keep making better. Throwing the Hubble Space Telescope into, well, space helps us see more clearly. There are other space-telescopes, but they don't look at the sky using visible light. They look at infra-red, microwaves, x-rays, gamma-rays - which are actually all different "colors" of light that we can't see. But that's an explanation for another time. Turns out certain kinds of stars are always the same brightness. Like, exactly the same. So say you have one of this kind of star "nearby" … near enough that we can still use the Geometry part of computing how far away it is _and how bright it is close up._ But Remember: this kind of star always has the same brightness as the others! So once you know how bright one of them is close up, you know how bright they all are. Take actual brightness. Take "how-bright-does-it-look-to-us". You can compute the distance to _any_ of this kind of star, no matter how far away, no Geometry problems anymore! It's a "Standard Candle" glowing in the dark. And if we see one of this kind of star in another galaxy, when we compute how _far away it is,_ we also know how _far away the galaxy_ that it's in is. We now have a way to figure out the distance to nearby galaxies. But, again, this technique can only get us so far. To figure out larger distances, we need more knowledge. More physics, more chemistry, more astronomy. And wouldn't you know, in the past 50-70 years, we've been figuring all that out. There's a certain kind of supernova that's always the same brightness. This is the next "Standard Candle". So we used the "certain-kind-of-star" technique to measure how far away a nearby galaxy with one of these supernovas is. And Here We Go Again: "How far away it is" + "how bright does it look from Earth" gives us "How bright was this exploding star to anyone close enough to get fried by it?" This kind of supernova is always an identical explosion, so look for others in galaxies even further away and measure how bright the bang looks from Earth. We know how bright it is close up. We can measure the distance to it. And this new "Standard Candle" in the dark is frickin' exploding star! Kinda hard to miss. Really easy to still see from very, very, VERY FAR away. But this still doesn't get us to the very outer edges of The Observable Universe. For that, we use the expansion of the universe [discovered by Edwin Hubble at the start of last century] and the Cosmic Background Radiation [discovered, accurately measured, and modeled at the end of last century]. Okay, so I'm being _really handwavy_ here. Can't be helped. Just know that we use this information _combined with all of the science, measurements from telescopes of all kinds, and techniques for computing distances_ to get us to the furthest reaches of the Observable Universe. So it's not just one person figuring this out. It's 4000 years of humans, generation after generation, learning, discovering, observing, computing, _and using what the previous generations learned_ to figure out the new stuff _that the next generation_ will build upon. (P.S. - The Universe isn't "moving faster than the speed of light," the space between two points is growing faster than beam of light can cross it. There's just, "more space coming into existence," nothing is really moving.)

I like my chances playing the lottery now

yeah, human mind isn't built to deal with such scale

@NikkieNick

5 жыл бұрын

I love your Infinite Tsukuyomi profile pic! - Nick

Given the magnitude of the universe , its practically statistically impossible that life originated on our earth alone. There might be civilizations that have evolved, more than us and eventually became extinct. And if there currently are, they are too far away to ever make contact .

Check out quantum entanglement. That’s a rabbit hole that will make you question everything again

you two are funny.

It's literally impossible for there not to be extraterrestrial life

To travel to mars is actualy is about like 6 mounth

The average chance of a planet being capable of supporting life in every 5000 planets is approximately 109.6%

With transdimensional travel, we can cross the universe in a few years, so we may be able to know someday.

It's like we are the size a bacteria in whole universe. May be our bacteria may have a universe that they can not cross

Hubble Telescope is how we know this

Saturn, Jupiter, Neptune and Uranus are all thought to be treasure troves of diamonds. Saturn likely rains diamonds though.

You say pick one but what you're missing is that they don't know and said such. They are speculating.

Well I wonder which planet the Kree and the Scrulls live on LOL! Just a heads up guys Brie Larson is going to be on GMA Tuesday morning and we should see a CAPTAIN MARVEL trailer for sure!! Hope to see reactions 😄

They managed to get a way to go to Mars in 8 months actually. I know this video is old.

nikkie you are so fucking cute ^^ astrophysik and quantum mechanics are my favorite hobbys i love your reaction :-D btw i subscribed, keep up the good work

@jupiter9049

3 жыл бұрын

no

Jessie j purple rain. Now that will blow your mind!