Answer on Astronomy | Astrophysics Question for Nikhil
a) Distinguish between spiral and barred spiral galaxies giving examples of each type of
b) What is a Seyfert galaxy? Explain how broad-line and narrow-line regions originate in a
c) Using the virial theorem, explain why there is a need to postulate the existence of dark
d) A galaxy of absolute magnitude of −20 is at a distance of 100 kpc. Would it be visible to
the naked eye?
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