13 billion years
The Milky Way can be seen at night, when there is no interference from city lights. Since city lights have been around for only 100 years or so, the Milky Way has been known since antiquity.
It didn't. The Milky Way has been known since long before the Hubble telescope was created. The spiral arm we call the Milky Way has been known since ancient times.
Well, we are in the Milky Way.
No one founded the Milky Way. It was around a long time before the Sun and the Earth were even formed.
Nobody has been outside the Milky Way.
we are in the milky way
The solar system is in the milky way
We are in the Milky Way. It is in the sky all around us.
All of them. We are inside the Milky Way; the Milky Way is all around us.
It takes the Sun (i.e., the Solar System) ca. 240 million years to go once around the Milky Way.
Uranus is within the Milky Way Galaxy.
Most planets that have been discovered are in the Milky Way