What are the main theories of galaxy formation?
The main theories of galaxy formation include the Big Bang theory, hierarchical clustering, and the cold dark matter model.
Can you explain the hierarchical clustering theory?
Hierarchical clustering suggests that small structures merge to form larger galaxies over time, influenced by gravity.
What role does dark matter play in galaxy formation?
Dark matter provides the necessary gravitational pull to help form galaxies and influences their structure and evolution.
Are there any competing theories?
Yes, there are alternative theories like the MOND (Modified Newtonian Dynamics) which challenges the role of dark matter.
How do astronomers study galaxy formation?
Astronomers use telescopes to observe galaxies, computer simulations, and analyze cosmic microwave background radiation.
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