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B Are galaxies part of constellations?

  1. May 19, 2016 #1
    reading up on the local group and in the wiki it says galaxies have constellations: https://en.wikipedia.org/wiki/Local_Group

    does this mean they are just in that area, or they are visible from earth as part of the constellation? I thought Andromida and possibly only Canis major dwarf were visible from earth?
  2. jcsd
  3. May 19, 2016 #2

    Simon Bridge

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    Welcome to PF;
    Technically, all the galaxies we know about are visible to us.

    There are a number of galaxies visible to the naked eye ... here is a list:

    Other galaxies are visible using telescopes of one kind or another.

    On the page you link to, the entry headed "constellation" refers to the constellation that the galaxy appears in.
    It's a handy note to help astronomers find it. For instance, the center of the Milky Way is in the direction of the constellation of Sagittarius.

    Note: technically a constellation is a region of the sky ... so galaxies are not part of the constellation but they can be found within it's boundaries.
  4. May 19, 2016 #3


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    hi there
    welcome to PF :smile:

    I didn't see that written anywhere in that link

    do you know what a constellation is ?
    when you discover that using google, you will then know the answer to your question

    now you are changing tact and getting to the real meaning
    I still want you to google what is a constellation

    Galaxies are visible all over the sky, some are bright and easily seen in a small telescope
    lots are very faint and require a larger scope to see them
    100's of millions of them are extremely faint and require the biggest telescopes to see them

    There are only 4 galaxies easily visible with the naked eye .... our Milky Way galaxy, the LMC and SMC ( satellite galaxies to the Milky Way)
    and the Andromeda Galaxy

    There seems to be a lot of argument over if the so called Canis Major Dwarf Galaxy is really a galaxy

  5. May 20, 2016 #4
    Thanks for the reply :) Yeah I have, and I read all about it. However, a lot of constellations were named and observed long before telescopes so I wasn't sure if some galaxies appeared as blobs or what looked like stars. Also, I am not sure that LMC and SMC are visible by naked eye after reading about it, seems only parts of our Milky Way and andromeda are visible, no?
  6. May 20, 2016 #5
    ah, this makes sense. Thanks!
  7. May 20, 2016 #6

    Simon Bridge

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    The Andromeda Galaxy used to be called "The Great Andromeda Nebula".

    "Andromeda" is the constellation (or the daughter of Cepheus and Cassiopeia.). You can usually tell which is meant by context, but you should be aware of the distinction.
  8. May 20, 2016 #7


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    incorrect ..... the large and small clouds of Magellan are very easily visible with naked eye :smile:

  9. May 20, 2016 #8


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    At least, that's how they appeared to Magellan, but these were visible to the Polynesians and others (including Magellan) long before the invention of the telescope.

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