New Zealand Girl Reacts to UNIVERSE SIZE COMPARISON 3D đ€ŻđȘ
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Its actually bigger than that...that was just the "Observable universe"
@James 23 actually the theorized stat is that the size of the entire universe is sextillion times bigger than the observable universe.
I wonder if that second to last void is an entire universe that died and collapsed in upon itself...
@@Mortismors The Bootes Void? It attracted some attention awhile back when some people theorized that it might be a vast empire building Dyson's Spheres, exactly the sort of thing the Fermi Paradox says we should be seeing, but if there was a bunch of invisible stars or dark matter or black holes or something else interesting there, we'd still see the gravitational effects it had on the stuff around the edges of the void, and that doesn't happen, so now we're pretty sure there's just nothing there but mostly empty space, just a bare spot in the universe. I believe current best theory is that it was originally just a small randomly occurring gap in the early universe, and as the universe expanded so did the void, so now it's huge.
@@ladrac198 That entirely depends on what model you follow, its also very possible that the universe may be infinite in size.
its trillions of times bigger than that
I can only quote a line from the movie Contact: âIf it is just us, itâs an awful waste of space.â
Carl Sagan...
Both answers are terrifying when you really think about it...
@@thezdbailey I think the second one would terrify me more in a way. Out of all of the trillions of stars in all the galaxies in all the wide, empty expanse of the wider Universe, and we're the only one with life? We are seriously mucking things up.
@@ColonelSpankysLostBattalion There are a LOT of things that there is no proof of...but that doesn't mean they don't exist.
@@ColonelSpankysLostBattalion Wasn't proof of the world being round in the past but look at us now.
04:08 That moment when Betelgeuse drops.
betelgeuse is always like your first big bertha encounter.
Get that Blast Resistance up
It's 1.3B kilometers like it shows. Pretty big. But it's the size of 1/5,000,000,000,000,000,000,000 of the universe, possibly more
@Todd Starbuck Beetlejuice!
Once pointed out to people itâs an awe inspiring sight even with the naked eye.
"How do we even measure that? Is it just educated guesses?"
Mathematics is a powerful tool. Along with knowledge of how light works, how everything (including light) is affected by gravity, and all sorts of other specialized astrophysical knowledge.....these are much more than just educated guesses.
Highly educated predictions
@@djkush4209 absolutely false claim bruh
@@neosis4182 How do you know? Are you an elder god? Do you possess knowledge that's so far ahead of our time that just seeing you would drive us insane?
Didn't think so "bruh"
We know a lot, but we don't know the full scope of the Universe because we don't know enough about Dark Matter/Energy.
not predictions. for large distances sin x = x and its simple trigonometry. most ppl don't realize how powerful simple trigonometry is
âSpace 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."
~Douglas Adams , The Hitchhiker's Guide to the Galaxy
âAnd you saw yourself," said Gargravarr, "in relation to it all?"
"Oh, yeah yeah."
"But...what did you experience?"
Zaphod shrugged smugly.
"It just told me what I knew all the time. I'm a really terrific and great guy. Didn't I tell you, baby, I'm Zaphod Beeblebrox!â
This about this mind numbing fact. Only about 31% of the universe is actually made up of matter. No one really knows what the rest is but it is called dark matter for now till we have a better understanding.
Don't Panic!
@@pflanagan1 It's not that hard, waters! Right from Genesis!
i came here to say this same quote
And thatâs just the visible Universe.
I watch a lot of these vids. Yeah we have no idea. Maybe in another 1000 yrs if we're still here things won't be as it seems.
@@ZERXERZANZIGER its terrifying to me that some stuff out there we'll never be able to see because the universe is expanding faster than the speed of light meaning its impossible for that light to ever reach us
*Check My New Sport Mix Out*
and only one of them
It's not visible. It's only Visible on the outside making it an illusion. And the observable universe is not the biggest. Multiverse is just half biggest object
"observable universe" which as far as we know is trillions smaller than the actual one.
Or half an inch smaller. There's literally no way for us to know. Everything outside that range is so far away the light from it has never reached us. And some things could be so far away the light from them never will, due to the accelerating expansion of the universe.
@@xyex I like to think that it is as big as our imagination
We think.
@@xyex In fact there may be a way for us to know how big the universe really is.
If we can manage to measure some kind of curvature of space in the observable universe, and this curvature has a positive value, then this may mean that the universe has a finite size, and allow us to evaluate it.
Assuming of course that this curvature is constant and not some local aberration.
For now, what we measure is that the observable universe is flat, or nearly flat, meaning that if the universe is finite in size, it should be very large compared to our observable part.
@@theslay66 I dont think that, because like light that can't reach us, curvature of space has the same restriction and can never reach us. So we can't meassure it. We need something different for meassurement or at least models with knownledge how the big bang worked.
âITâS HUGE...ITâS HUGE!â
Thatâs what she said.
Ah you beat me. Was about to post the same exact comment.
I think the same thing xD
HEY THATS DISRESPECTFULđđ
@Chantip Chea I also beat.. something.
XD
A star with planets is a "system" (as our "Solar" system, our star is called Sol.). Many stars together is usually called a "Galaxy". A number of Galaxies together is a "Cluster". A number of clusters is called a "Super Cluster".
i like the calling Sol system. it's personal while not personal in the same time. if i made sense.
Then a universe
our star is called sol? its the sun wtf.
@@gigachadthegodofallchads5527 Yes. And Proxima Centauri is the "sun" for it's system. Ours is the SOLar System.
@@gigachadthegodofallchads5527 All stars are suns, it is just a matter of perspective. When you are in a star system you can call the local star 'the sun'.
Just as Earths moon is also just a moon, but its real name is Luna.
01:42 "there's so many new planets now that have been discovered" Me: God I hope she meant Exoplanets by that.
That fear you feel is very natural. We all feel it when we first start learning about the universeâs scale and vast emptiness. It goes away over time the more you learn, even as youâre left stunned by new information. Even still, itâs impossible for us to truly conceive the scale of Earth relative to ourselves, let alone the scale of celestial bodies and galaxies.
Humans can never imagine :
1. What happens after death
2. How large is the universe
There is another video called "How the Universe is Way Bigger Than You Think
" with commentary over it, and it blows my mind every time I watch it.
Would love to see a reaction to it
Yes, watch that one!
The Sun is actually a star and most of the others are stars just huge but from earth so small and Ceres is a dwarf planet and callisto is a moon of either Saturn or Jupiter and the black thing are black holes and nebula are where stars are born
Callisto is the second largest of Jupiter's moons, one of four that is visible through good binoculars or even a cheap, small telescope from earth. The others being Io, Europa and Ganymede.
@@bujin1977 thank for confirming
Nope those are NOT Black holes - The Big Black ones - they are quasars
@@collguyjoe99 what is quasars?
@@northernmajor407 Quasar, an astronomical object of very high luminosity found in the centres of some galaxies and powered by gas spiraling at high velocity into an extremely large black hole. ... Quasars are among the most distant and luminous objects known.
I get overwhelmed three times over with videos like these .
First is by the size of the planets and stars.
Then by the distances between them.
Finally by the shear number of them there are.
That something so small relative to the universe is capable of contemplating its place within it is magical, and it excites me thinking about how likely it is that other life forms, even if far apart, are doing something similar.
the sizes are measured by parallax method , Doppler Spectroscopy and Transit Photometry
Those are red giant stars that will eventually blow up in supernovas. The bigger the star the faster they burn through their fuel so the shorter their lives before they blow up.
Ahhh I remember learning about Supernovas
Astronomers are waiting for Betelgeuse to go supernova, and it could happen at any time, or not. If it happens in our lifetime, then it really happened a long time ago.
@@CourtneyCoulston If they are far enough away, they probably have already gone supernova. Everything we observe is old information. If you "look" at something 100 million light years away, you are seeing it as it was 100 million years ago (also accounting for the expansion of spacetime and whatnot). Because we detect things by sensing the electromagnetic energy emitted in our direction. That is what "seeing" is, it's photons interacting with your eyes.
@@dinhnguyen2110 That's only if our perception of light is accurate. If everything we do is based on and modeled by it, and it's wrong... then everything we think we know is wrong. What if the information of light is instantaneously and when we look out, we aren't just seeing the past, but also the future! When we think we know something within the sciences, we run with it for 100 years, 10 years, etc. until new information changes our theories. Just follow the path that chemistry has taken in the past 200 years and see how many times the model of the atom has changed! Do you think our perception of sound and light is any different or any better?
@@skilz8098 It's true that what we think we know might not be totally accurate, but we are pretty certain that what we see means 'something' coherent.
If light was instantaneous, it effects a lot more than just vision and perception. It's true we can never 'know' anything with 100% reliability, but if we model reality on the best current data/observations it will always be better than the alternative (that being a model that ignores the data).
To say that light is instantaneous would affect our conception of causality itself. Which our conception may be wrong, but it is unwise to assert that it is without giving a better explanation. Otherwise you get into the problem of arguing in FAVOR of ignorance. Working off what we think we know is better than working off what we think is untrue.
Actually, that is just the size of the visible, measurable universe. We simply have no clue yet what is beyond that radius - and we most likely never will.
A lot of the measurements are done by forming a triangle using earths orbit around the sun which we know, and then the parallax (angle) from the object to the two furthest points of our orbit, then simply use triangle rules to find the distance (and correct for other stuff) but that's the basics of most measurements I think :)
Every star you see in the sky is a sun with possible planets surrounding it.
And a chance of life
@@somethingbr1018 Not really.
@@maxdrags3115 you never know
@@scapedrag7893 I do.
Fun fact most of these big stars are called âRed Supergiantsâ and are one stage away from collapsing/exploding. The impact to us would be small but everything around it would be instantly vaporized or absorbed.
I was so sad when Betelgeuse didn't explode last year (or, well, 640 years ago). I would love to see such an incredible super nova light up the night sky for months like that. Imagine a light in the night brighter than a full moon for months on end? Would be amazing.
Honestly, yeah seeing that would probably be once in a life time or two.
Yeah, looking up at the stars at night is basically looking back in time.
Sees Ceres and the Moon, says: "There's so many new planets now that have been discovered" ... Eh, did you mean the Moon or Ceres? Neither is new, or planet. ... ok ok, Kepler 22b is a recently discovered exoplanet, i guess you meant those.
I'm pretty sure Ceres has been classed as a dwarf planet.
To learn more of this, look at Carl Sagan's series, "Cosmos," which is available on youtube. Although there is some new information that has been gained since the series was produced in the 1970s, it illustrates the fundamentals with an eloquence and beauty that has never been matched. The first episode includes a brief overview of the size and content of the observable universe and it also begins to explain how we gained this knowledge (including a wonderful description of how Eratosthenes first determined the size of the Earth, 2200 years ago, as the first step in how we learned to measure the distances you asked about.) Neil deGrasse Tyson's updated version of the series is also very good, but I see it as a supplement, not a replacement, to Sagan's original series.
There's a new Cosmos series with Neil deGrasse Tyson, that's also well done and incorporates a lot of the more modern knowledge we have now compared to Sagan's series. Worth a watch.
"The Universe" part is not remotely true, that is just the part of the universe that we have seen, called the Observable Universe.
The actual universe is even bigger then that.
And it expands evry second
@@gamerdrache6076 Yee yee!
say sike right now
@@gamerdrache6076 the opposite really
@@dude1473 no actually it gets faster and faster
Theres a limit to our observable universe. With the expansion of the universe, there is a horizon that we will never see past. The light from anything past this horizon will never reach us.
"Why are we here?"
Because why not? We just are. There is no reason. It just happened. Physics and chemistry came together and gave rise to life on Earth which eventually evolved into us.
Physics and Chemistry didn't just happen, Light was Spoken into existence, Energy, Motion, Force, Matter, Space, and Time began. It was Created! I see nothing but Intelligent Design!
@@skilz8098 Really? Because I see a lot of really dumb design.
There is nothing intelligent about the design of the human foot and spine, or the laryngeal nerve in nearly every single animal.
I see nothing but the results of small incremental changes over time.
@@KurNorock Because only a dumb person would see or say those things!
@@skilz8098 That's not very christian of you.
@@KurNorock No? God gave us Free Will! So tell me what's not "Christian" about it? What because I insulted another? Just because you insult someone doesn't mean that you don't love them or hate them... I'll continue to insult where I deem it necessary and see it as fit! I'm not one of those holier than thou hypocritical liars! I'm as honest as I can be, and I tell it like it is, no matter how hard the truth is!
her:"the sun! it's huge!"
me: first thinking should i make a that what she said joke and then realize...she's just at the sun! it's gonna be glorious.
Your excitement and willingness to learn is addictive, I binge watch the heck out of your videos đ€đ»
Callisto appears.
"There's so many new planets now that have been discovered."
Callisto's one of Jupiter's moons, actually. The FIRST body - Ceres - is considered a dwarf planet (and the only such body found inside the orbit of Neptune, I believe).
Yeah...
Ceres is in the Asteroid Belt, not orbiting Neptune.
@@dwarvenmoray I didn't say it did. I said "inside the orbit of Neptune" - in other words, closer to the sun than Neptune.
@@Pixelologist Ah, I hear you now.
Feel they started with Ceres in the asteroid belt as it's the smallest body that's close to round in our Solar System, though many of Jupiter's or Saturn's moons may be both smaller and round.
Other dwarf planets like poor demoted Pluto, Charon, Sedna, Eris, Quaoar, etc. may be less accurately measured and so may not get listed here.
I expect Kepler 22B is listed here as it's the smallest planet reliably measured orbiting around another star.
So, the measurements are relatively accurate, however, the further you go out away from the Earth, the less accurate the readings get. In simple terms, they use triangulation on a planetary scale. They take measurements of the closer objects by make a distance measurement and then come back 6 months later (Earth on the other side of the Sun) and take another measurement. They use basic triginometry to determine the distance from the object based on the angular change. So, take a line and draw it across between the two measurement points that the Earth takes (6 months apart). This distance is opposite the angle that is formed between the two measurement points and the object that we are trying to measure. Once you have measurements of a close object, you shift to a nearby object and assess that same angle. If the angle gets smaller, the second object is further away than the first (behind it in space, relative to us). The change we know where the 2 points of measurement are and the opposite distance (distance the Earth is 6 months apart). Compare that to the angle and you can work out how far the distance the second object is and by subtracting the distance to the first object, you can determine how far behind the first object the second object is. The is how celestial maps are drawn for the most part. There are other ways but this is the basis for all current methods of mapping the universe. The problem of distance arises from the fact that space is not empty and light can go through material that will make accurate measurements difficult. Gravity is also a concern. Gravity is the weakest force but when you have enough mass (blackholes) the gravity can be significant enough to bend space/time and thus light will bend. In this case, you are not getting a reading of a straight beam of light but a bent (refracted) ray of light. Thus, the light beam travels further and your readings will appear closer than the actual distance since you will only be able to measure to the point the beam is bent, not to the point of origin (the star or nebula).
Not sure that helped or made it more confusing. However, you seemed interested in how the measurements were made and how accurate they were. So cheers!
That only works for nearby objects. You need light-wave shifts and cepheid stars to measure things further away. Different physical processes that take place at known rates but whose appearance changes when far away from us, or moving at high speeds. The sum of the different methods is called the Cosmic Distance Ladder.
Yeah, the scary part is that all of this is just the stuff we can see and measure. What is actually out there beyond the observable universe could be completely beyond our comprehension. Also, the universe appears to demonstrate "extreme isotropy": In other words, no part of the universe is fundamentally different from another part (maybe with the exception of the Bootes Void). That means that, if there is life here on Earth, we can logically expect to see more life spread evenly throughout the universe. The actual frequency is unknown, of course.
Lovecraft :grin:
Itâs like - totally mind boggling! đ
INSANE
*Check My New Sport Mix Out*
The shear amount of size and distance can blow your mind outside of Earth. I'm reminded of all the Alien Invasion movies (which I love!) but this reminds us...they don't even know we are here. LOL! Great reaction! You bring up very different stuff than most and we all love you for it! Looks like you are going to hit 100k soon. You deserve it. Lots of Love to ya!
"It's huge! It's huge!"
I don't know why, but I can never hear that enough. Please continue.
2:40 Yep couldn't say that one
(Neap-Tune) Neptune. It's simple lol
Hello, welcome to the joke, what can I serve you today?
@@statmadness452 uranus
This video is really cool!!
So cool right! So mind blowing!
There are more stars in the known universe than grains of sand on the entire earth. We're very, very, very small, but beautiful.
3:26
Thatâs when my stress and anxiety really wants to play
NZ Girl: "Woooowwww Saturn is so big!!!"
Me: (waiting to see her face when she sees Betelgeuse) àŒŒàșÙÍàșàŒœ
Yes, those things larger than sun, which look like stars, are stars. yes.
@Gavin Ott big red light planet hmmm
Courtney this video was so good
I love the thought that although this seems hard to get your head around and completely mind bogglongly alien, we are part of it, we seem insignificant but we came from the stars like everything has, and even when we are gone we will still be part of it, I remember Brian Cox saying this and I've never thought of being insignificant in the same way since â„
Just a friendly reminder of how small and insignificant we all are. Have a nice day everyone đ
Isn't it insane?? hahaha.
Bro u good?
Just because we are small, that in NO way makes us insignificant.
the Galaxy song by monty python..
this video is really cool, and also first
I loved it so much! So insane! And thank you so much! You were super quick!!
Yesssir, your welcome
âThe cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself.â
Carl Sagan
love the vids yo. your reactions never get old.
"Sun" is the name us humans gave our star
Yes, the star's name is Sol. Just like the Earth, it's name is Terra. To an inhabitant of Star Prime, THAT would be earth, and their star would be the sun.
Well seeing as we don't know what anyone else has called it, sun will work just fine.
@@bromixsr this guy gets the optimism behind it. A lot of people think it would be scary if we were alone in the universe but I see it as opportunity. The final frontier is ours for the taking, our only obstacle is our ambition.
@@Horible4 and the fact that we still don't know why toast always falls butter side down đ
@@HemlockRidge In Swedish "sun" translates into "sol" or "solen" as in "the sun", so we're literally calling the sun by its name. Which is pretty cool I would say.
What is really crazy is they consider the universe just what we can see. Who knows what is beyond what we can observe.
Damn that's so true...
No. No one considers that. The universe is considered in mathematical estimates. Observable universe is a whole other concept. The diameter of that is 93 billion light years. The whole universe is considered to be about 250 times the size of the observable universe.
www.bbc.com/earth/story/20160610-it-took-centuries-but-we-now-know-the-size-of-the-universe
No. Only God can.
"sirius A"
Sirius black : "magicđ "
It could take a photon of light 100,000 years to reach the surface of the sun to then begin its journey to us. And yes, the universe is big, and we don't even know if physics works the same way in each galaxy.
The disk of the sun on the horizon takes about 2-3 minutes to set. So when you're watching the sunset, it's already set.
We measure astronomical distances using a technique called parallax. Basically, close one eye and look at an object far away. Then have the other eye open instead. Notice the object "move." We use that distance the object "moved" to calculate its distance. Astronomers use this same technique, but with Earth as one of your eyes open or closed depending on where it's at around The Sun each year.
The other technique for distances beyond our galaxy is to look at the brightness of "standard candles" things like certain stars that only occur at certain brightnesses, so no matter how far away it is, it's a certain brightness you already know, so you can calculate its distance that way.
The first one which you saw was newly discovered drawft planet located near the asteriod belt and the one call CALLISTO is one of the 200 moons of diifferent planet in our solar system
Courtney , I can have these conversations all day long. There is a video that shows universities outside of our Milky Way universe. It is beyond mental and just crazy how small we are. The thing that really get me is how this great big universe and us are connected. It's mind-boggling!
BY THE WAY!!!!!! On a completely unrelated note, thank you for reacting to are Blue Devils space chords (saw what I did there!!!) from 2007!!! It was cool to see that again. In fact if you want to really get a really good understanding of space chords, look at the universe and listen to that. The part where it goes into the cluster parts
Courtney: gasp*
The Universe: *smirk* so far...
Lol the look on your face at the end was priceless. Great reaction đđŸđđŸ
Courtney: a lot of these planets I didn't even know existed
Me: some of those were actually moons but okay lol
This video has been updated for 2020, and itâs even better in my opinion
The infinity scale goes both ways.... large and small... that's a mindbender.
they use parallax, standard candles, redshift/blueshift, gravitational lensing, all kinds of tricks to figure out how big and how far away stuff is.
3:28 thatâs what she said! Kidding lmao đ
Good day Courtney. Whenever I see one of your videos is about to be shown I always hit the like button before the video starts. Why would I do that, you may ask? It's because the videos are always informative and you are so entertaining! You bring happiness and a smile to all of us. Thank you for all that you do. Keep up the great work. đđ
I know right we also watch this in our class room hahaha lol
Trying to understand how big our universe is,is like trying to describe the size of our cruise ships to Christopher Columbus his brain could never fantom a boat that big.
this is why i love space its super fascinating but super scary and dangerous if u get caught in in the wrong place
It can be argued that the question isn't 'Is there life out there?' but rather 'Is there intelligent life near enough to be relevant anytime soon (as in years, centuries, or even millenia)?'
i hope there is intelligent life out there, because theres bugger all down here (monthy python)
Radiotelescopes focusing on small areas of space detect all light rays and analyse the wavelengths /spectral data to determine what cosmic bodies there are.
Those unknown planets are usually given numerical "code names" based on the telescope that captured them, other times named from a catalogue listing them - NGC is one such code (named from the New General Catalogue, and focusing mainly on stars and nebulae)
These are usually exo-planets, as in - planets not part of our solar system, but discovered orbiting a different star.
We can still see 13.8 billion light years away because the universe is 13.8 billion years old
Lol I loved your reactions :)
âTwo possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying.â
â Arthur C. Clarke
I believe that we are not alone we have infinite space we didn't even explore it even 1% yet.
If we're not alone.... what's out there waiting for us? Or maybe they already know and are just waiting...đœđŸ
I love how they added the void
It comes down to far more than just Trigonometry as a lot of people in the comments are saying. That can only get you distances to relatively nearby objects.
For further objects you use things like spectroscopy and see how the light has been shifted. Missing bands of light frequencies shift in predictable ways based on distance.
Physicists have an overlapping series of measurements called the 'Cosmic Distance Ladder' that enable them to measure and verify distances.
It is actually very similar to how we measure dates in the past. No single method can measure all ranges but there are different measurements that overlap in their measuring range and we can verify they both work where they overlap.
I don't pretend to remember the details but there are plenty of youtubes explaining it all.
5:39 "Small Magellanic Cloud"
Me: "uhh.. uh oh..."
Hi Courtney! You had the same reaction to when I first saw this. Speechless! That look on your face after the Milky Way. Thanks for doing a reaction to this one.
The Universe pulled the ultimate flex. Lmao
If it has a number it itâs name, itâs either an asteroid (which none of these are), an exoplanet, or a star.
And small moons of Saturn and Jupiter but ignore them.
Space is very frightening when you see what's out there. It's awesome!
Too put it bluntly, the universe is so overwhelmingly vast that the light from the "rest" of the universe hasn't had the time to reach us yet, and that's why we call what we can see "observable universe", because that's actually really all we can see.
Light has insane amounts of info trapped inside of it. Light that travels far begins to redshift and that in of it self can give you a lot of data.
Youâre right near the end there. A light year is how far light can travel in an earth year. So if there were aliens that are 250 million light years away and they were able to look at the earth all theyâd be able to see would be dinosaurs walking around
Half way through the look on your face said thatâs so huge my mind cannot comprehend, neither can mine lol
The crazy part is that it takes 100,000 years for light photons from the Sun's core to reach the surface. Then another 8 minutes for that light to reach Earth.
Total madness, and mind-blowing đ€Ż
They forgot My *ick Gaaaatdamit! lmao
Some of those items are planetoids, like Ceres. Some are black holes, some are quasars, and some like the Bootes Void, is just a massive area in space where there is nothing; no stars, no galaxies. Since the universe is so immense and continually expanding, its difficult to comprehend that we are alone and that somewhere out there must exist other intelligent life. But you're correct about one thing, all these stars and galaxies we see in the night sky, we are looking at the past since it takes so long for the light from them to reach us.
I crying all time whenn i see this video
Approximate light year calculation:
Speed of light =186,000 miles per second.
Seconds in a year = 31,536,000
186000 x 31536000 = 5,865,696,000,000 miles = approximately one light year.
We can measure these celestial objects with radiotelescopes at at least three spots at the same time. Because all these telescopes are connected and located around the world it's possible to observe an object almost continuously.
We can mesure the size of different objects, by observing their movements trought time, and by its movement, we can calculate how big staff are, and yeah, the beggining are starst, then back holes, nebulas, super clusters, galaxyies, ect
edit and yeah, when you watch the stars, you see them as they were back in time, 100 1000 10 000 years back in time
Measuring the distance to a star or another galaxy is tricky as the angles are so small. So they use the light from the stars especially variable stars as measuring candles.
Booteâs Void is scary. Whatâs beyond it? Is there a beyond?
And people complain about how long it takes to fly from point to point on this tiny little planet in a backwater section of a barely-average sized galaxy.
I can't my mind blown up
Awesome reaction!
Yes, when we see the light from these distant stars, hundreds, thousands or maybe even millions of years have passed since the light left the stars. Many stars that we see could be gone by now.
*Her Reaction, Was Priceless.*
Itâs worth noting that the non-observable universe is estimated to be 150 sextillion times larger than the observable universe - if you multiplied this number by the amount of kilometres in 93 billion light years (the diameter of the observable universe), youâd get a number so large, it has not yet even been named by us.