View Full Version : Discussion: Early Universe Might Not Have ...

2004-Sep-18, 12:05 AM
SUMMARY: You always hear that the early Universe was a violent chaotic time, with galaxies smashing into each other. Maybe it wasn't quite that crazy early on. Alister Graham from the Australian National University has analyzed images taken by the Hubble Space Telescope, and found that there were 1/10th the collisions that earlier studies had suggested. It was thought that it took multiple collisions for galaxies to clear away the stars at their cores - this is how astronomers built up the earlier model - but Dr. Graham calculated that it could actually happen with just one collision.

What do you think about this story? Post your comments below.

2004-Sep-18, 12:19 AM
I like this story. I have been of the belief that the build up of galaxies [especially spirals] did not require lots of collisions. I think the central black holes formed very early at nearly the present-day masses, and that the bulk of the build up of the galaxies has come from infalling gas-clouds [and the occasional consumption of a dwarf galaxy or two].

This story seems to support that vision.