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Press Room 2013 2012 2011 2010 2009 2008 2007 2006 2005 Archive All News News Conferences Public Affairs Office David Aguilar (617) 495-7462 Christine Pulliam (617) 495-7463 pubaffairs@cfa	Press Release Release No.: 2006-15For Release: Wednesday, May 17, 2006 When Dwarfs Gave Way to Giants The first dwarf galaxies to form in the universe sabotaged their own growth and that of their siblings by ionizing surrounding hydrogen gas. Early galaxies were small, containing only 100 million solar masses of material. Later galaxies required at least 10 billion solar masses to be assembled. This artist's conception shows a collection of hot, blue stars comprising an early dwarf galaxy surrounded by red hydrogen gas. Credit: David A. Aguilar (CfA) High Resolution Image (jpg) Low Resolution Image (jpg) Back to Press Release
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