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  1. The galaxy is known to host an extended emission-line region (EELR, violet cloud) around it. This is produced by the central black hole. Here the image by the Subaru telescope:

    [https://subarutelescope.org/old/Pressrelease/2002/04/15/index.html](https://subarutelescope.org/old/Pressrelease/2002/04/15/index.html)

    [https://bsky.app/profile/melina-iras07572.bsky.social/post/3mai2vnstxs2k](https://bsky.app/profile/melina-iras07572.bsky.social/post/3mai2vnstxs2k)

    .

    ”I also made a [#Hubble](https://bsky.app/hashtag/Hubble) image showing a little bit of the EELR near the center of the galaxy” (Melina Thévenot):

    [https://commons.wikimedia.org/wiki/File:NGC_4388_Hubble_WFC3.jpg](https://commons.wikimedia.org/wiki/File:NGC_4388_Hubble_WFC3.jpg)

    [https://bsky.app/profile/melina-iras07572.bsky.social/post/3mai2vpguz22k](https://bsky.app/profile/melina-iras07572.bsky.social/post/3mai2vpguz22k)