population I and II, in astronomy: see stellar populations.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.
Research our extensive archive of more than 80 million articles from 6,500 publications.
Additional search results provided by HighBeam Research, LLC. © Copyright 2005. All rights reserved.
About Infoplease, Part of Family Education Network
© 2000–2014 Pearson Education, publishing as Infoplease