SUMMARY: Astronomers have been studying the deepest optical view of the Universe - the Hubble Ultra Deep Field (HUDF) - and they think they've found some of the first star forming galaxies. These galaxies began forming 0.5 to 1 billion years after the Big Bang. The team analyzed the HUDF, and found dozens of red, dim dwarf galaxies, which appear to be the first basic galactic building blocks. These would merge with other galaxies to eventually form the complex spiral formations like our own Milky Way. The also found regions which were more dense than others, which supports the theory that dense regions of space where the first places galaxies formed.

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