Galaxy Zoo Talk

How close to consider it a Merge?

  • Ericha by Ericha

    How close should two objects be to consider a merge? If not a merge, is only one object described and the other ignored?


  • ElisabethB by ElisabethB moderator

    Hi Ericha and welcome to the Zoo

    It is not so much a question of distance but more of distortion. If you see signs of interaction then I call it a merger. Two galaxies that appear close together could be very far apart and just be in the line of sight.

    In this image there s no merger for me.

    Happy hunting !