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Comparing M31 (left) and NGC891 (right).
Both images taken with the same telescope/camera configuration.
M31 is at a distance of 2.5 million light years.
NGC891 is approx. 27 million light years.
For the M31 original, see http://www.pbase.com/wjshaheen/image/130039547/large
For the NGC891 original, see http://www.pbase.com/wjshaheen/image/129986318/large
20101105_Size-comparison.jpg
All images copyright William J. Shaheen, unless otherwise noted. Do not use or distribute without prior consent.