Nonetheless, she contributed to the flawed theory of power, reinforcing the bottom-up theory
If Windhorst and his colleagues are right, the Hubble image has captured the pieces of a galaxy before they had assembled, providing a striking illustration of the bottom-up theory
of galaxy formation, in which large galaxies arise from the merger of smaller objects.
The original bottom-up theory
, on the other hand, accounted for small-scale structure extremely well but couldn't reproduce the giant walls, filaments, and voids that telescope surveys began revealing in the 1980s.
The competing, bottom-up theory
could also account for a few massive clusters, Uson says, but a discovery of several more of these blobs could spell trouble for bottom-up supporters.