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  4. Jeremiah P. Ostriker
  5. If you take a galaxy and try to make it bigger, it becomes...

If you take a galaxy and try to make it bigger, it becomes a cluster of galaxies, not a galaxy. If you try to make it smaller than that, it seems to blow itself apart.

Jeremiah P. Ostriker
Blow, Trying, Bigger
"Fundamental laws - Astronomical reach". Interview with Catherine Zandonella, research.princeton.edu. January 31, 2014.
If you take a galaxy and try to make it bigger, it becomes a cluster of galaxies, not a galaxy. If you try to make it smaller than that, it seems to blow itself apart.