Around 1922.
There's only 1 universe the milky way is a galaxy
The Milky Way is not the only galaxy. There are more than a trillion times a trillion galaxies in the whole universe. Scientists have already discovered many tens of thousand galaxies.
All of them are. Generally elliptical galaxies are the oldest.
The Milky Way Galaxy is one of over 100 billion known galaxies.
No the Milky Way is only a galaxy in space (the Universe) and is very small indeed by comparison.
No. The Milky Way galaxy is just one of billions of galaxies in the Universe. Just like there are billions of planets in the Milky Way Galaxy, there are also comparable numbers of planets in other galaxies.
No, there are thought to be other galaxies that are just as big, even bigger. The milky way isn't the only thing in the universe; even the universe itself is larger than the milky way. The Milky Way isn't even the biggest galaxy in our "neighborhood", galactically speaking. The Andromeda Galaxy appears to be about twice as big (though the jury's still out on which has more mass; the Milky Way may have a slight edge there).
No. There are many galxies, but only one of them is the Milky Way Galaxy.
Scientists don't know. We have only discovered a few hundred of the probable billions of planetary systems in this galaxy.
There no milky way in sky there is only milky way galaxy
No - there are about 200 - 400 billion stars in the Milky Way Galaxy
the other parts are only seen because there are clouds in the milky way galaxy that prevents scientists to see all inside the milky way galaxy