Hubble has sent back an image of the Spiderweb Galaxy sitting at the centre of what will become a huge galaxy. Hundreds of smaller galaxies are congregating around the Spiderweb Galaxy in what astronomers describe as "an emergent galaxy cluster".
The image, according to NASA and the European Space Agency (ESA), provides the best evidence yet that the truly huge galaxies are in fact created when hundreds of smaller ones merge together.
More: http://www.theregister.co.uk/2006/10/13/emerge_galaxy/