Shape of the Milky Way

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From: Eric Kielich (ekielich@mttam.org)
Date: Mon Jan 12 2004 - 21:34:17 PST 

Message-id: <fc.00802e9500050d9200802e9500050d92.50d93@mttam.org>
Date: Mon, 12 Jan 2004 21:34:17 -0800
Subject: Shape of the Milky Way
From: "Eric Kielich" <ekielich@mttam.org>

I had a student ask me how astronomers figured out the shape of our
galaxy, and I admit I was stumped. Can anyone help me with this? We have
studied different galaxy shapes and all that, but how did astronomers
determine the shape of something they could not see from afar?

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