What is a Galaxy. I'll take astrophysics for 400.
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 has NO center
Universe >> Milky Way galaxy >> Solar System > Sun >> Earth
Mars and Earth are planets in a galaxy called the Milky Way, inside the universe.
the universe
No. The Milky Way is estimated to be nearly as old as the Universe itself.
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.
there is exactly one milky way galaxy in our universe (why would there be two galaxies with the same name?)
Nope, other way around: The Milky Way - our home galaxy - is part of the universe.
Universe >> Milky Way galaxy >> Solar System > Sun >> Earth