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Thread: Question about AP and the hubble telescope.

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    Default Question about AP and the hubble telescope.



    Ok I'm going to put this one out there and it might sound daft but it's really confusing me.

    How is that when fellow members and the Hubble Telescope take pictures of objects in and out of our galaxy, that they don't get other objects in front of them. For instance taking a photo of our neighbour the Andromeda Galaxy how come we skip seeing our own Milky Way and get just a clear shot of the Andromeda Galaxy. Same with let's say Orions Nebula surely there is something in front of that in the galaxy or am I just being stupid. Forgive me as my knowledge on anything astronomy wise is very little but my interest is very high and wanting to learn how our galaxy is put together.

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    Default Re: Question about AP and the hubble telescope.

    There are all kinds of examples where there are foreground objects in front of the target. A quick look at the photo of M42 in Wikipedia shows at least a dozen stars in front of the nebula. Same thing with galaxies, in which case every star in the image is in the foreground.

    Distant objects such as the Twin Quasar, the Einstein Cross, and many other example of gravitational lenses appear the way they do because there are foreground objects between us and the target. The lensing masses in those cases are other galaxies, and are therefore not part of the Milky Way, but the principle is the same. There are lots of foreground objects in most pictures.

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    Default Re: Question about AP and the hubble telescope.

    Here’s my favorite image of a foreground and a background object. Both are ring galaxies. Look inside the foreground ring at about 1 o’clock.https://en.m.wikipedia.org/wiki/File...27s_object.jpg

    Space is pretty empty is the short answer

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    Question ...what you are asking...

    Im thinking what you are asking is why objects like those in the Kuiper Belt or further out within our galaxy are not picked up in the foreground of images of DSOs?
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    Default Re: Question about AP and the hubble telescope.

    Actually, the original question is mistaken.

    In looking in the direction of the Andromeda and Orion nebulas we do not get a clear shot. There are plenty of foreground stars from the Milky Way in front.
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    Default Re: ...what you are asking...

    Quote Originally Posted by cherokee View Post
    Im thinking what you are asking is why objects like those in the Kuiper Belt or further out within our galaxy are not picked up in the foreground of images of DSOs?
    They're too dim to show up.

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    Default Re: ...what you are asking...

    Quote Originally Posted by not_Fritz_Argelander View Post
    They're too dim to show up.
    This is what I was trying to say and looks as though it has been answered. Having read your answers and then looking back I can now see the stars in the foreground of Andromeda and not thinking they are around the galaxy it's self

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    Default Re: Question about AP and the hubble telescope.

    There are objects like NGC6888 the Cresent Nebula where the foreground and background stars are a problem while imaging.



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    Default Re: Question about AP and the hubble telescope.

    It seems obvious now people are putting photos up it was just I was watching a documentary on YouTube last night and the pictures just looked so 'clean' I guess I could say.

 

 

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