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Originally Posted by Ari Jokimaki
Yes (that of course depends on what you mean by in depth, you can always define it so that only one object fits your definition). Here's just some of them: NGC 450, NGC 1199, NGC 1232, NGC 5296, NGC 7603, 3C 120, 3C 343, ARP 220, M49, MRK 273, NGC 3628, NGC 4151, NGC 5683, NGC 7331 & Stephan's Quintet, 3C 345, Local Group, M87, M101, NGC 520, NGC 4235, NGC 5128, M82, NGC 470, NGC 3384, NGC 3842, 0846+51W1, NGC 6503, NGC 1073, NGC 1097, NGC 2859. References and more objects to the list are available on request.
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