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Galaxy Structure

Myth vs Reality: Galaxies Over Time

This short video addresses the misconception that galaxies never change.
Credits

Galaxy Structure
 
 
Produced by the Space Telescope Science Institute’s Office of Public Outreach.
 
All images, illustrations, and videos courtesy of NASA, ESA, and STScI except:
 
·       NGC 6822 image courtesy of the Local Group Galaxies Survey Team/NOAO/AURA/NSF
·       Taurus constellation drawing from Firmamentum Sobiescianum sive Uranographia by Johannes Hevelius, courtesy of the United States Naval Observatory
·       NGC 4565 image courtesy of the European Southern Observatory
·       Small Magellanic Cloud image courtesy of F. Winkler/Middlebury College, the MCELS Team, and NOAO/AURA/NSF
 
Written by Vanessa Thomas
Designed by John Godfrey 
Music courtesy of Association Production Music
Transcript

(SPEECH) 
 [UPBEAT MUSIC PLAYING] 

(DESCRIPTION) 
 Bright teal lines separate the screen in half. Title. Myth versus Reality. Above the Myth side is a constellation map with a horned bull. On the Reality side is a dark sky with a bright white light. 

Text. Myth. Galaxies never change. 

Reality. Galaxies are continuously changing and evolving. Some changes, like those caused by galaxy collisions, happen slowly over a long timescale, and affect the entire galaxy. Others, like star explosions, occur very quickly, and affect small areas.