What part of the milky way do we see from earth? When looking up at the night sky, we can sometimes observe a bright band of stars stretching across it. I know this is our galaxy but exactly what are we looking at? 


Could we look at the centre of the galaxy or is there another spiral arm blocking our view?
How does our view change as earth rotates around the sun? (E.g. What part of the milky way do we see in a winter night sky)
Fraser Cain:


  We’re seeing the galaxy edge on, from the inside, and so we see the
  galactic disk as a band that forms a complete circle around the sky.
  
  Which parts you can see depend on your location on Earth and the time
  of year, but you can always see some part of the disk.
  
  The galactic core of the Milky Way is located in the constellation
  Sagittarius, which is located to the South of me in Canada, and only
  really visible during the Summer. In really faint skies, the Milky Way
  is clearly thicker and brighter in that region.


If you want to know more, watch this video from Fraser Cain which explains it in details:

https://www.youtube.com/watch?v=pdFWbEwsOmA

You can find your answer in the first minute