Galactic Building Block Busters
NOV 13, 2006
DOI: 10.1063/PT.5.020603
ScienceNow : If a castle is built with nearby rocks, you’d expect the stone walls to be made of the same stuff as any remaining boulders in the area. Likewise, if our Milky Way galaxy grew through the merging of smaller dwarf galaxies, you’d expect it to contain the same types of stars as the remaining dwarfs that have not been incorporated. But detailed observations of four of these dwarf galaxies show that this is not the case, indicating that theories about how galaxies form are incomplete.
© 2006 American Institute of Physics
