Astrophysicists map the Milky Way's 4 spiral arms
Monday, January 5, 2009 - 08:35
in Astronomy & Space
Iowa State University's Martin Pohl is part of a research team that has developed the first complete map of the Milky Way galaxy's spiral arms. The map shows the inner part of the Milky Way has two prominent, symmetric spiral arms, which extend into the outer galaxy where they branch into four spiral arms.