I love big community builds. It's awesome to see what builders can come up with when they pool Lego bricks together and work as a team to create a large scale model. Hit the Bricks, a collaborative build by COWLUG (Colorado/Wyoming Lego User Group), is on display as a permanent exhibit.
The mosaic background is a wonderful touch. You don't see this very often but it works really well here.
There is also a wonderful timelapse of the assembly done by the Fiske Planetarium Production department.
[Photos: University of Colorado Boulder]