Question

Astronomers suspect that a galaxy's type can be determined either by initial conditions in a protogalactic cloud or by later interactions between galaxies. Each item below describes either an initial condition or a later interaction. Match these items to the galaxy type expected to form as a result.

Answer 1

Galaxy types can be determined by initial conditions or later interactions. Massive elliptical galaxies form through a rapid collapse of gas and dark matter.

Step-by-step explanation:

Astronomers suspect that a galaxy's type can be determined either by initial conditions in a protogalactic cloud or by later interactions between galaxies.

Galaxy formation models suggest that massive elliptical galaxies formed in a single, rapid collapse of gas and dark matter, while spiral galaxies formed from a protogalactic cloud that collapsed and formed a rotating disk.

Collisions and mergers between galaxies also play a role in determining a galaxy's properties and development.