Name: How to Simulate the Universe on your Laptop
Uploaded: 2020-03-28T09:26:27.000Z
Duration: 2 min 16 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

This is the amazing and beautiful Millennium run - it's a simulation of the large-scale

evolution of the universe from just after the big bang all the way to the present.

The researchers at the Max Plank Institute in Germany who ran the simulation began with

the latest observations of what the early universe looked like - [the cosmic microwave

background radiation] and simulated the evolution of the universe forward in time using the

laws of physics to see how the galaxies and galactic clusters of today grew out of the

tiny fluctuations in the density of the early universe.

As a testament to their success, the Millennium simulation looks strikingly similar to the

actual universe as shown in the equally impressive 3D map of the universe created by the Sloan

But the millennium run was no small feat - it contained over 10 billion simulated particles

and ran on over 500 computers for a total of 350,000 hours, or 40 years, of processor

So not to be outdone, here's my version that I did on my laptop in only a few minutes.

And I did the simulation using off-the-shelf video special effects software (in fact, if

you want to try this yourself, I believe you can even download a free, fully-functional

So how did I simulate the universe on my laptop?

Simple - I began with a real image of the universe about 13.7 billion years ago, used

it to tell a particle simulator which particles should be lighter and which should be heavier

(to simulate the slight variations of density in the early universe), turned on a little

bit of gravity, a little bit of friction, and watched the particles go!

Now, it's by no means the millennium simulation - for starters, it's only two-dimensional

and the gravity isn't physically accurate… but nevertheless, here you have it: the large-scale

evolution of the universe as simulated on a laptop.

For those of you interested in the particular details of how to make this particle simulation

in After Effects, check out the tutorial HERE.

And if you just want more minutephysics, click here to check out last week's video about

what would happen if we dug a tunnel through the earth and jumped in.