#TBT - MAY 31, 2012 - COLLISION OF THE LOCAL GROUP GALACTIC TITANS
Hey Space Placers! Enjoy this #TBT video and story. Visualization: NASA , ESA , and F. Summers ( STScI ); Simulation: NASA , ESA , G. Besla (Columbia University), and R. van der Marel, and J. Anderson ( STScI ) Sky Guy Greg