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The Size of Space
Transcript of The Size of Space
But Space is bigger than the gaping hole left in my heart since Brexit
Space is a bit big tbh.
Space is infinite. This is due to the fact that space is always expanding, so as we present this slide to you, space is getting bigger.
aka the only slide written by Aimee
The observable universe is 13.7 billion years old. That might make you think that it space’s radius is nearly 14 billion light years. That is more than likely not true, and actually, the currently most quoted estimate of the minimum radius of the universe is 78 billion light years. This may not be true either as the most scientifically accurate estimate is that the OBSERVABLE universe is a sphere with an almost 90 billion light year diameter. Less than that and light would have had time to circumnavigate the cosmos. Basically, that was a lot of long words hiding the fact that no one has a clue.
Let’s try to do some math that would put it in perspective. In one year light will travel 9.46 trillion km. Multiply that by the age of the universe. Let’s see, that is 9.46 trillion multiplied by 14 billion years. Well, I called it simple math, but, obviously, I was not being serious. Lia had to stop doing the math before she passed out because Aimee is smarter than her.
Unless you weren't paying attention ( aakanksha hmMmM) you will have noticed that we are talking about distance in years. So what's that about?
You may have heard of light years, but they sounded confusing and boring so you ignored it. Well actually, a light year is quite simple.
Light year - the distance that light can travel in one year. Light moves at a about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km. More precisely, one light-year is equal to 9,500,000,000,000 kilometers
To put that in perspective our luvly planet has a diameter of around 40,000 km so you would have to travel the world
200 million times
to travel a light year
Times that by 78 billion (remember space is 78 billion light years approx. radius) and would you look at that there goes my will to live.
The Size of Space
Lia and Aimee
some other estimates
there are many different estimates on what the actual size of space is, some based on fact and others on their own wrong opinions :)))) despite there being much beef within Astronomers™, no one is entirely sure what is correct or not. here are some estimates:
-13.8 billion light years
-15.8 billion light years
-27.6 billion light years (diameter)
-78 billion light years ( extends from the observable universe)
-156 billion light years
-256 billion light years ( hubble percentage estimate)
to clear boeuf up (more explaining)
in the midst of all this we have forgotten to mention a probably very important part. one of the reasons that the size of the universe is either a) infinite or b) debatable is that we cannot really see that far into space, in comparison to what is there. the observable universe is what we can see from earth (which we have previously established is a 90 billion light year in diameter sphere). as for the rest of the universe, well you know it might either be infinite or 78 billion light years in radius i don't know.
as we have said, the universe is constantly expanding. some peeps refer to this as the metric expansion of space. more specifically, this is when the scale of space expands, or when the distance between distant parts of space expands. this is constant with the big bang theory. it is thought that the universe started off as one very very dense mass which got set off by a fuse and exploded everywhere. matter expanded and everything got less dense to the point that there is one proton per cubic meter.
there is a lot of complicated maths and physics which we do not really understand involved in the accurate reason why space expands.
but basically the reason the universe could expand in this way is because of its energy density which is basically the amount of radiation, matter, protons etc put together divided by the
volume of the universe. think about this: if you have a Universe where you double the volume, the matter density halves. same mass, twice the volume, therefore the density is half. for example if you have an uninflated balloon with dots on it, the dots would be close together. however when you blow it up, the dots will spread out. basically that's how it works we don't make the rules sorry.
WE ARE STILL EXPANDING THE UNIVERSE IS EXPANDING AS WE SPEAK.
WE ARE ALSO EXPANDING ALOT QUICKER THAN WE DID FIVE BILLION YEARS AGO NOT REALLY SURE WHY BUT SCIENTIST SAY THAT SOMETHING CALLED BLACK MATTER IS NEHIND THIS. THAT IS NOT PART OF OUR SUBJECT.
basically the universe is very big. it is possibly infinite- it is also possible that it belong in a multiverse, with other universes. these other universes would have completely different laws of mathematics, harmonic series and matter. Theoretically, these multiverses would belong in one big huge super big massive thing called an omniverse. if this universe isn't infinite, that probably is. have fun quetsioning your existence