Which of these are NOT typically gravitationally bound?
A) open star clusters and superclusters of galaxies
B) globular clusters and superclusters of galaxies
C) galaxy clusters and superclusters
D) globular clusters and galaxy clusters

Question

Quizplus · Accepted Answer

Open star clusters and superclusters of galaxies are not typically gravitationally bound in the same way as more tightly bound structures like globular clusters or individual galaxy clusters. Open star clusters can disperse over time due to gravitational interactions, and superclusters are more loosely associated groups of galaxies rather than tightly bound systems.

Which of These Are NOT Typically Gravitationally Bound