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Have you ever wondered why our Galaxy has a spiral structure?
How do we even know its shape at all?
What is 'Dark Matter' and why do we think it exists?
Why can 'infra-red' and 'radio' astronomy reveal things that normal astronomy cannot?
Answering these and many other questions, the concepts here are ideal for students at school or college,
or just those with a passing interest in our Galaxy.
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