The Milky Way is not a universe; it is a galaxy.
And, whatever do you mean with "vortex"? Perhaps you are referring to the gigantic black holes that appear in the center of many galaxies? In this case, yes, our Milky Way has a supermassive black hole, with a mass estimated at 4 million times the mass of our Sun.
The Universe. The Milky Way is equivalant of an atom of sand on the beach to the Earth as the Milky Way is to the Universe.Yes. The universe is everything in existence. The Milky Way is but a microscopic part of the universe.
the milky way is a galaxy. the universe is all of space.
No. There are many much larger galaxies in the Universe than the Milky Way.
the universe
No. The Milky Way is estimated to be nearly as old as the Universe itself.
Nope, other way around: The Milky Way - our home galaxy - is part of the universe.
The universe has NO center
Universe >> Milky Way galaxy >> Solar System > Sun >> Earth
No. The universe is everything we know. The milky way galaxy is just part of the Universe. There are billions of other galaxies that make up the Universe.
About 99.9999999% of the universe (or so). The Milky Way is a single galaxy in which our star, the Sun, exists. There are billions more galaxies like the Milky Way in the rest of the universe.
there is exactly one milky way galaxy in our universe (why would there be two galaxies with the same name?)
Universe >> Milky Way galaxy >> Solar System > Sun >> Earth