The Shape of Galaxies | How the Universe Works
submitted by pkamweru
on 09/05/15
1
Why are galaxies spiral shaped? The answer...gravity is needed to shape each galaxy into the structures we know of today. | For more How the Universe Works, visit science.discovery.com/tv-shows/how-the-universe-works/#mkcpgn=ytsci1 Subscribe to Science Channel! | www.youtube.com/subscription_center?add_user=sciencechannel Check out SCI2 for infinitely awesome science videos. Every day. | bit.ly/SCI2YT Download the TestTube app! | testu.be/1ndmmMq
