fundamental astronomy - What would the night sky look like if the Milky Way were the only galaxy in the universe?

It wouldn't be too apparent, but there are a few objects that you can see in good viewing conditions with the naked eye that would disappear.

Here they are in order of brightness. I marked the objects in a reddish color.

1. The Large Magellanic Cloud, apparent magnitude 0.9, located in the constellation Dorado. Only visible from the southern hemisphere.
   




2. The Small Magellanic Cloud, apparent magnitude 2.7, located in the constellation Tucana. Only visible from the southern hemisphere.
   




3. The Andromeda Galaxy, apparent magnitude 3.4, located in the constellation Andromeda.
   

And that's it. Seriously. Sure, there are a few others, but they're exceedingly difficult to see.