By categorizing them.
How did galaxies form?
Galaxies form from giant clouds of condensing gas and dust.
Why do galaxies differ?
Collisions and the formations affect the way galaxies turn out.
What are quasars?
Active galactic nucleus.
What is the power source for quasars and other active galactic nuclei?
Black holes.
Do supermassive black holes really exist?
Almost certainly.
What does QUASAR mean?
Quasi-stellar radio source.
Who is Maarten Schmidt?
Maarten Schmidt is a Dutch astronomer who measured the distances of quasars.
What is Cosmology?
The study of the origins and eventual fate of the universe.
What is the Cosmological Principle?
The universe looks about the same no matter where you are within it.
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