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

Question

Quizplus · Accepted Answer

The starting assumption in models of galaxy formation is that some regions in the universe start out denser than others. This density fluctuation is believed to be the result of quantum mechanical fluctuations that occurred during the early inflationary epoch of the universe. Over time, the densest regions began to collapse under the force of gravity, forming galaxies and other large structures. Black holes are believed to form later in the process, as a result of the collapse of massive stars. It is not assumed that all galaxies start out as spiral galaxies.

Which of the Following Is an Important Starting Assumption in Models