Reacting to How the Universe is Way Bigger Than You Think 

Thanks to two telescopes up in space we mostly know Hubble and the James Webb. We can see things that wouldn’t be visible to us normally.

How do we know this is out there? Basically because we've taken pictures of it with long exposure photographs from telescopes. Look up the Hubble Deep Field photograph. In an area of the sky half the size the full moon covers it observed literally thousands of distant galaxies. Almost every bright object in the photo was a whole galaxy - all in a section of the sky smaller that the moon appears. Now imagine that small patch of sky spread across the entire surrounding space - if only our eyes were sensitive enough to the dim light to be able to see them.

From what I understand overtime(millions of years) light develops a red tint and that tells us the lights’ sage which tells us how far it traveled since we know the speed of light.

We know these things because we can observe them (via telescopes [think Hubble, James Webb, etc.]). Distances to close stars can be made by triangulation (taking an snapshot of the star at one point of the year [i.e. Earth's rotation around the Sun], then taking an image of the same star at the opposite point in Earth's orbit around the Sun. This gives us enough to calculate the distance to that Star. Distances to further stars are estimates, based on using 'standard candles' (i.e. stars whose luminosity and distance are known from the above method, and which are then used to judge the distance to other further stars using the inverse square law). It's not perfect, and updates/revisions to what we "know" of distances are fairly common, but these methods are good approximations. We don't really "know" 100% that all these distances are 100% accurate. They're science-based estimates. :)

i also start to get teary eyed every time i hear that carl sagan quote. its not a sad thing, its a very inspirational thing. it just makes you want to know more about whats out there, but it also puts you into your place if you have an ego. it shows that we are absolutely nothing in the relation to the size of the universe. but thats not a bad thing, not at all.

I think another mindblow to add would be the Milky Way's speed of rotation. It would take 200 MILLION years to do one lap around it. The animation there is like super hyper fast speeded lol. Even from dinosaurs to humans, it would be just a bit of movement. The whole history of humanity would be a slight shift from a few pixels to the next, basically not visible AT ALL

Yeah that's the impressive part of Earth to Moon and to Mars communication, shows the impressiveness of the speed of light

I think videos like this should been shown to everyone just for the fact that we all should get notice how meaningless our conflicts here on earth are and that we should join together as one humanity

the most mind blowing thing is that, when you look up into the sky and see say, a galaxy of some distance from us, we're seeing it as it looked that many years (# of light years) ago. So it no longer looks like that, in fact, it's probably not in the same spot anymore.

Step 1: build telescope big enough to see distant stars\galaxies. Step 2: pick an object, observe it, and determine how far away it is (several ways to do this) Step 3: repeat step 2, gradually building up a 3d map of the universe centered on earth Step 4: blow people’s minds with map of observable universe

Dooode. This is my first time watching this and like Beesley I was like, why am I getting emotional? It made me realize how minuscule we are and I mean us on planet earth.

That one was really astounding. I've seen similar explanations of the size of the universe, but this one was by far the best done and the easiest to follow. Thanks for sharing it!

Now we need to send an expeditionary team to check if there's a light bulb in the center of Pluto.

The matches of the big bang, the cosmic microwave background (the echo of the Big bang) and such

We know about that primarily because we observe them with our telescopes. Then there is also very much math involved, For the distances we look for constant events we know like pulsars and put them in relation to one another. Then we use the doppler effect to determine their movements relative to earth and trigonometry to get their distance to earth. And much much more ! And the more you know the more it blows your mind and tells you you know nothing ! So let's stay curious !

mat and telescopes, in a nutshell. a scientist worked out a tried and true method to figure out how far away a celestial body is. Different telescopes, both on earth and in orbit, have long-scanned a single section of night sky, and using scientific formulas of math and physics, have been able to judge distance/age. hope this helps

I've just discovered your reaction to this video - such an amazing, eye opening and mind blowing experience, isn't it?! ;) Great reaction and you've just gained a new subscriber! :)

I LOVE this vid! Thank you so much for posting. It keeps me thinking...and thinking is a good thing!

The reason that distance from Mars and Earth (or any two planets) varies so much is that they orbit the Sun at different speeds and the paths of their orbits are not the same. So at some time they can be close or far away. The way we know all this is because of telescopes. Early discoveries were made with visual telescopes, and they are still used, but to see so far away, other telescopes are used: radio, infrared, x-ray, and gamma ray. Time will allow the light from interstellar objects the time to reach us but in most cases there will not be much difference. Right now when we look into the night sky we can see stars, planets, galaxies, nebula etc. Whether or not you see a specific objects in the night sky is dictated by it's brightness, distance, and how many other objects are in that area. There are also some relatively darker areas of the night sky and ones with many stars.

9:25 The reason we know it's there is from massive telescopes like the Hubble telescope and more but still we don't really know if it's still there sense it takes thousands of years for the light to reach our planet but good question tho💯

It's amazing isn't it? Were basically nothing in the expanse of the universe.

40 minute round trip for messages... Welcome back to the Age of Exploration in terms of ability to communicate.

Isn't it amazing? Like you, I am always awestruck when I see and contemplate this, and then to consider the potential of the possibility of this just being one Universe of a series of Multiverses, and the potential for multiple dimensions. One would think, given this, that we could all pull together and work together as the one people that we are. I continue to both hope, and pray.

"How do they know what's out there?" We can see it my lad, we can see it!

Planets can be different distances away because of our orbits and we're not all going around our orbit equally at the same rate and all that

You’ve gotta check out size comparisons of space. You wouldn’t believe how big some things get. I used to think our Sun was pretty big, but then I found out about UY Scuti.

One word. Telescopes. Their time machines looking back in time

the light has reached us from these places, cause its been travelling here for millenia. all the photos of stars and galaxies show us what the looked like in the PAST, sometimes long iin the past. thats how we know.

Human mind is nearly incomprehensible to size, distance of our very own galaxy, let alone the super cluster galaxies. And these galaxies are like a single grain of sand in all the world.

With two known points we can establish the distances to other stars, planets, galaxies. Etc

for mars's distance remember taht the circle around earth is an elipse, thats how we get seasons, also explains mars's distance range, unless im wrong on that

never knew you were from Jersey! Hi from New Jersey!

The way we know what is "observable" and where it is now even though it is so far away that light hasn't had time to reach us from its current position has to do with time, light, the expansion of the Universe, and some very smart people with very powerful computers. We can see pretty far back in time by looking at old light just now reaching us from 13 billion+ light years away, effectively looking back in time at how the Universe looked when it was young. By modeling the known rate of expansion of the universe with the positions, mass, and movement of the galaxies (as we can see where they used to be as we look back through time with our telescopes) it is possible to extrapolate the size and position of most of the visible universe as it would look in real time. It isn't perfect and is constantly being updated as we get more information but it is amazing to think that this picture is going to change even more when the powerful Webb telescope goes into operation soon (fingers crossed).

What lives in dust, bacteria we're bacteria living on a dust particle 😂💯

40mph on Jersey. That'd drive me nuts 🤣

Hubble telescope and radio telescopes helped to see far. 50 years since this would have been totally impossible

Also up until the point where they reached the entire observable universe there and before light can still hit Earth from that far away considering that's the age of the universe and how long that light has been traveling and it it's not moving away from us faster than light travels

visual observations are how we know. we have already detected over 4,000 planets beyond earth around 3,000 different stars other than our sun. there are still another 7,000 awaiting confirmation. we have enough planets to calculate the probability that a planet is orbiting a particular star which is, one planet per star approximately. and we know the number of stars in the galaxy using telescopic observations and estimation of distances and density distributions.

Search up most beautiful space images. There’s some jaw dropping stuff

Loved the video love to see people react to awesome things. What was the song you used at the end?

“A thousand years”. Lol. Billions of years.

@beesley. This is easier to explain why it "a penny for your thoughts" or "your 2 ¢ worth" OR if "Love is blind" how can it be "love at first sight"

What's even more interesting Is that what we've seen has taken so much time to reach us here at earth. That what we are seeing is probably not even there anymore. It's almost like we are looking into the past.

They know these things because they can do inferential statistical analysis and extrapolate. Meaning to say it’s educated guesses.

The small yellow dot he referred to was the distance that we have managed to send radio signals, but we receive light from all over the universe... although by the time the light from some of the distant stars takes to get to us, some of those stars will no longer exist..

Anton Petrov has an absolutely fascinating astrophysics channel you would love- His explanations are fascinating while easy to follow and understand

Next react to “How the Ocean is Way Deeper Than You Think”

I know you react to a lot of sports and American stuff. That is the user basis you've built. But stuff like this is refreshing and yes, we are really, really, really small.

me: hey her: stay 580,000,000,000,000,000 light years away from me me: but i have your order

Anyone listening to what Carl Sagan said even if someone else is saying what Carl Sagan said while showing you that photo is bound to be emotional and the way that they Incorporated actual photos of legitimate references to each category of people call Sagan was talking about just made it that much more visceral.

That was how far radio waves have gone, not how far we can see. We know because we can see it all.

please stay amazed. dont get jaded. your excitement is our salvation. we need people to be blown away by existence.

The world spends about 25 billion dollars every year on space exploration technologies. That's how we know these things.

The universe has no beginning, no end. So it has no size.

More plz! Fair play, mate!

Both Voyagers are still going and hopefully have a few more years before their power supply runs out. They each recently passed through the heliopause and into interstellar space. Only took them about 40 years.

It’s insane how tiny we are. Smartest species we know of, but that doesn’t mean much. We are nothing and everything at the same time. We know because we looked with telescopes and various forms of radar. We have no idea how big it really is. We don’t even know if it stops. The universe could just be forever; we don’t know.

Inmate: so wat u in here for ? Me: i illegally drove to the moon

Science, technology, & most importantly, math

Bigger than big ...never ending...

You can fit 30 earths between us and the moon, or even weirder, every single planet in our solar system almost exactly. As to how we know the scale, telescopes, we can see the light from those galaxies...with a powerful telescope...but the further away, we’re just seeing the large structures, not resolving individual stars. The other bit is we can actually only see as far as 13.9 billion light years, but because we can measure the expansion rate of the universe (light waves stretch if they came from something moving away from us) those galaxies we see are now 46.5 billion light years away, we just see them at the time when they were closer to us

Love your content :D I saw you were bit confused about distance of Mars well :D it's because Mars orbits the Sun in a more eccentric ellipse than Earth. In a certain position it is sometimes closer to us. That's why there is such a big difference between distances.

They can map it out with the telescopes they use

We know it is there because we can see it with powerful telescopes.

I can't see 15 feet away from me on earth but i can see a moon 200k miles away from me

The light from this planets and stars.

The highest speed limit in my state is 70. That’s very interesting that it’s so slow in your city lol

Beesley take a trip with Richard Branson or Jeff Bezos into space and do a reaction video from space👨‍🚀

More science stuff! Might I suggest ocean-related videos? The Ocean is Way Deeper Than You Think - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-GE-lAftuQgc.html MBARI's Top 10 deep-sea animals - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-80OG2BGrmyA.html

3:56 - why won't you see this view or stand on Mars? You are young. If in 30-40 years (maybe soon?) scientists learn how to digitize human consciousness you could travel to Mars in 30 minutes (that you won't even notice), download into a body and take a walk on the surface without needing a spacesuit. Then half an hour and you are home.

We are atoms upon atoms upon atoms stacked squared

Something cool for you here. The speed of light is STUPID FAST KM per hour: 1,079,252,848.8 (1.07 billion) It’s almost unfathomable

Are we living in a huge black hole. That’s a scary thought.

2 Trillion other galaxies? Yeah there's no way there's any other life out there

You should do a video of the universe black hole. Scary 😨

math is how we know, and we are pretty good at studying light.

How do we know? Have you heard about telescopes yet? They can see more than your eyes can. A lot more.

How can I make you understand that there is a thing called the 'observable universe'? There's stuff beyond, but we can't see it. I just want you to see Yellowstone or Vermont when the leaves start to turn!!

It can vary because Earth & Mars orbit the Sun at different speeds. They're closer to one another when they're on the same side of the Sun, and farther when they're on the opposite side of the sun.

Him: “HOW DO WE KNOW!?” Jesse Pinkman: YEAH! SCIENCE BITCH!!

Mathematics, that's how we know about the universe.

The good news is flatterers are not a group of people that you actually have to argue with considering the fact that their own science is proving the Earth is round over and over and they continue to waste money trying to prove the Earth is flat... Also once traveling to at least low earth orbit is cheap enough where you can go for a school trip for the weekend or whatever then most people are going to know someone who's been to space or I'm going to space themselves

It's recorded by radio waves. That's how we know.

How do we know that this is there? Well, the short answer is: Light, sensors that can detect light and math. Oh and image interpolation.

Everything is far away to us. But are we a science project at an alien's laboratory?

yes, how do we know, this "new" invention called telescopes :)

In fact, people are not small, medium-sized objects on the scale of the universe and even slightly larger than average. The smallest distance in the universe is considered to be the Planck length. It is 1,616,255(18)⋅10^-35 m. Roughly speaking, it is 10^-35 times less than a meter or 10^-32 times less than a millimeter. 10^32 is 100 nonillions or 100 thousand billions, billions, billions. Here is how this number looks like 100000000000000000000000000000000. In general, 1 with 32 zeros. So, the dimensions of the observable universe are 880 * 10^24 meters or 880 yottameters. Or it can be represented as 10^26 degrees of meters, for convenience. So, if we take the most approximate, convenient values of the Planck length and the size of the observable universe, we will get a gap from 10 ^ -35 to 10 ^ 26 meters and the average value on this scale will be from 10 ^ -5 to 10 ^-4, while the size of a person on this scale is 10 ^ 0. The size of our galaxy will be 10^20, the atom 10^-10, the Earth 10^7. And I'll tell you this, 10^ -5 - 10^-4 meters is 10-100 micrometers or 0.01-0.1 millimeters, and this is the size of some bacteria. They are the average-sized objects in the universe and a person is 10-100 thousand times larger than them. And for reference, 0.1 millimeters is the minimum size that we can see with an unarmed eye. So we are not so small on the scale of the universe and even slightly larger than the average size of objects 😄 (Sorry for my poor English)

Human guesses about such things are very limited. It really is hard to grasp just how large the observable universe really is. Even for the experts. Certainly bigger than I could walk in a day.

I love your reactions. Could you react to the attack on Pearl Harbor by Montemayor

I tried to tell how tiny this place is... come to America, marry me, we'll be divorced two days later!! It'll be fun!!!!

We don't actually "know" the exact number of stars and planets in our galaxy It's more of an estimation based on the mass of the galaxy and the patterns we see Keep in mind that they ALWAYS go with the lowest outcome in such calculations Hence why he says "at least"

To answer your question It requires black magic 🙃🙃 Its all about technology and human intelligence

space is grand and hurts to think where it goes or how it started. where is the GF she missed the fun.

You should do a reaction video of Shiey.

*There are no stupid questions in science man* :) Basically, it's part of an inference based on extrapolation. The Hubble Deep Field is an image from a space telescope that focused on a single, tiny region of sky, _"about 2.6 arcminutes on a side, about one 24-millionth of the whole sky, which is equivalent in angular size to a tennis ball at a distance of 100 metres."_ In that image, there were *ten thousand* Galaxies. Not stars, entire Galaxies that were countable. Generalize that to the entire 360° cosmic horizon and OMG!!! Yeah, it's ridiculous.

How do we know? That is what astronomers do

That seems so strange. Correct me if I'm wrong, but you measure in kilometers, right? Why use the metric system for everything but speed? Seems confusing. How long does it take to go 1000 kilometers at 60 mph?

If you enjoyed that, you should check out the black hole comparison by morn1415

I can't believe you weren't taught this is school!!

what if it is more than sextillion ? what if it is a dectillion number ?