'City of stars' Westerlund 2! Awe-inspiring 3D fly-through

Based on Hubble Telescope data, Space Telescope Science Institute’s (STSci) astrovisualization team produced this awe-inspiring journey through the heart of the Westerlund 2 star cluster. 20,000 light years from Earth, this busy stellar community hosts some of the hottest and bright stars in the Milky Way Galaxy. -- Full Story: https://www.space.com/29197-hubble-space-telescope-25th-birthday-photo.html Credit: NASA, ESA, G. Bacon, L. Frattare, Z. Levay, and F. Summers (Viz3D Team, STScI), and J. Anderson (STScI) / Acknowledgment: NASA, ESA, the Hubble Heritage Team (STScI/AURA), A. Nota (ESA/STScI), and the Westerlund 2 Science Team, and ESO / mash mix by Space.com's Steve Spaleta (http://www.twitter.com/stevespaleta)