Which of the following is an important starting assumption in models of galaxy formation?
A)Galaxies form first,then black holes.
B)All galaxies start out as spiral galaxies.
C)Black holes form first,seeding the formation of galaxies.
D)Some regions in the universe start out denser than others.

Question

Quizplus · Accepted Answer

The assumption that some regions in the universe start out denser than others is crucial in models of galaxy formation because these dense regions are where the first seeds of galaxy formation are thought to have formed. This assumption forms the basis for hierarchical models of galaxy formation, in which small structures first form through gravitational collapse and then merge to form larger structures. Choices A and C are incorrect because the order of galaxy formation and black hole formation is still an area of active research and debate, and there is no consensus on which forms first. Choice B is incorrect because not all galaxies start out as spiral galaxies - there are a variety of galaxy shapes and types that can form depending on various factors.

Which of the Following Is an Important Starting Assumption in Models