Galaxy Zoo Talk

Quad Merger

  • wwg1775 by wwg1775

    How many galaxies are merged here? Two? Three? Four? Maybe none?

    How can you tell whether they are merged or simply superimposed in the image?

    Posted

  • Notes by Notes

    Might be one merger or none, but in this case it's too far away to tell for sure. 'Debris trails' joining galaxies are one clue. You can't confirm 'merger' if one galaxy is simply 'in front of' another from photos, but if they are adjacent in the image you may see signs of interaction.
    The more you see, the clearer it will become!

    Posted