observable universe that we can see now used to be a tiny volume of it, maybe an atom in my arm.
The observable universe by which I mean the universe that we can see because light has had time to get to us from its, from objects, right, so it's about 13.8 billion years back
The observable universe contains more than a hundred billion galaxies.
The observable universe contains over 100 billion galaxies, maybe it's 300 billion, maybe it's 400 billion but it's probably not many more than that.
Our observable universe is pretty big.
in the observable universe .
be its own entirely observable universe .
The universe beyond our observable universe , the universe beyond our bubble of inflation that came to an end.
atom expanded and became the entire observable universe that we see.
that's the size of our observable universe .
to a maximum scale of the observable universe .
is there are 10 to the 22 stars in the observable universe .
And there are a hundred billion galaxies in the observable universe , as many galaxies as there are stars in the Milky Way.
We have every reason to believe that our observable universe , 46.1 billion light-years in radius from where we are,
They've gone on to make up the low-level radiation that permeates the entire observable universe , the Cosmic Microwave Background, or CMB.
That is why the 46 billion radius is the edge of the observable universe .
may be responsible for 63-- sorry 68.3% of all the total energy in the observable universe .
You can go all the way out to the edge of the observable universe back in time.
Well, let's just think about the observable universe for a moment.
So we've measured galaxies now out to close to the edge of the observable universe with instruments like the James Webb Space Telescope,
We have to look at how many particles are there in our observable universe .
Also, the size of the universe-- we know the observable universe has a diameter of something like 90 billion light years nowadays.
was very long and convoluted, it may have happened only once in the entire observable universe .
And everything we can see-- all the physical things we can see-- only 5% of the observable Universe .
Can you guys do that, where it can just fly to any part of our observable universe and see what's going on there?
The number of numbers you need to describe that system exceeds the number of atoms in the observable universe .
All that we have access to in our universe, in our observable universe to look for,
Now, we can also estimate how many ordinary matter particles, like protons and neutrons, there are in the observable universe today,
There's at least that many in the observable universe .
So we talk about how you can visualize or start to grasp, for example, the size of the observable universe .
Anyway, if you ask me to put it into the number, one side of the observable universe is 46 billion light years far from where we are.
There is no intrinsic arrow of time in the laws of physics, but we think that there is in our observable universe
is part of something even bigger, what we affectionately call our universe, or our observable universe , this ball here.
It says, it's considered is the another tentative number of ten to the power 78, which is the number of atoms in the observable universe .
and the Milky Way galaxy are going to combine right they're going to collide and combine to form the Hakee galaxy or you know Milkometer And at that point, our entire observable universe is
The problem is when you think about the condition the universe was in at that point where I mean take our observable universe , right?
And that's because there's such a thing that we quantify as the observable universe .
That's our observable universe .
The numbers are kind of debated, but let's say something like 2 trillion galaxies, large galaxies and smaller galaxies in the observable universe .
And in that book, Barrow and Tipler say that in their view, there might be one civilization in the observable universe ,
So we've measured galaxies now out to close to the edge of the observable universe
So when we say, "Hey, we've been around for 13.8 billion years, you know, with an observable universe full of 10 to the 90 particles