2020 October 25 - Dark Matter in a Simulated Universe
Channel: APOD Podcast
Date: 2020-10-25

In today's image, we see a simulation of a dark matter universe like the one we live in. Dark matter is needed to explain many things that are observed in our universe like the way galaxies rotate, why galaxy clusters do not disperse out into space and why gravitational lensing is as strong as it appears. 

This YouTube channel is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: https://apod.nasa.gov/apod/ap201025.html.

I also provide lecture videos to accompany the free OpenStax Astronomy textbook (https://openstax.org/details/books/astronomy/) on another channel. They are avilable here: https://www.youtube.com/playlist?list=PLMahwAGxKuWldeQ_qaIj8c0i7qbfyfLj4

Note: All commentary is created by me and is not necessarily approved or sanctioned by APOD or NASA.