Family of Galaxies | How the Universe Works

In 1924, Edwin Hubble discovered that there were more galaxies other than the Milky Way. | For more How the Universe Works, visit http://science.discovery.com/tv-shows...

Subscribe to Science Channel! | http://www.youtube.com/subscription_c...

Check out SCI2 for infinitely awesome science videos.  Every day. | http://bit.ly/SCI2YT

Download the TestTube app! | http://testu.be/1ndmmMq

• #science_technology
• #science_documentary
• #how_the_universe_works
• #space_science
• #galaxy_formation
• #big_bang
• #astrophysics_explained
• #galctic_families
• #science_channel
• #discovery_channel
• #how_the_universe_works_tv_program