well congrats you noticed some new stars or supernova's that appeared!
sometimes stars that shine bright (like the ones that make up the big dipper) are outshone by brighter stars or supernovas, it seems like the original stars are gone, now the universe is constantly changing and most of the stars of (let's say) 1000 A.D are not in the same position as they are now. anyway in a few days or weeks you'll see its back to normal :)
no it's not. But the other night when I was out star gazing, it was up side down. Or it appeared to be.
Supernovas? I want see one!