How do we have pictures of our own milky way galaxy if we live in it?
Answers
Because we are inside the Milky Way, we don't get to take any pictures of it from an angle "above" the Galaxy—for example, like this beautiful picture of M31, the Andromeda Galaxy. (However, we can make an educated guess as to what the Milky Way might look like from such an angle—for example, see this artist's illustration.)
Instead, we only get pictures in which we see the structure of the Milky Way edge-on, from inside of it. Examples of these pictures in many different wavelengths of light can be found here. Each picture is a panoramic photo—if you want an idea of what we really see, imagine taking each picture and wrapping it in a big circle around you. The photographer has simply chosen to "cut" and "unfold" this circle such that the Galactic Center (the brightest part of the Milky Way) is in the picture's center. This might give the illusion that we are looking at an edge-on picture of the Milky Way from the outside, but in reality we are not—the left and right edges of this picture simply represent material in the Milky Way that is located in the opposite direction of the Galactic Center from our point of view, and since we ourselves are pretty close to the edge of the Milky Way, there isn't much to see in this direction.
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