1. His astronomy research focused on a young galactic cluster designated NGC 2264. 2. The bubbles are in this case ghostly cavities in huge galactic clusters . 3. And these wind directions were lined up with the galactic clusters within superclusters. 4. Galactic clusters are gravitationally bound large-scale structures of multiple angular momenta of galaxies.5. It is possible, he said, that other galactic clusters are singing in other tones. 6. These dark matter clumps then formed the " scaffolding " around galaxies and galactic clusters . 7. The farther away the galactic cluster , the earlier it theoretically formed after the big bang. 8. This is in contrast to the appearance of young, nearby galactic clusters , the astronomers said. 9. Strongly interacting massive particles have been proposed as a solution for the cooling flows in galactic clusters . 10. It was later debated that the incredible luminosity was caused by the gravitational lensing of a foreground galactic cluster .
