There weren't any telescopes/rockets at the time.
The Milky Way Galaxy.
It is fairly typical
Wavelengths is what allows astronomers redshift a background galaxy that is covered up. This is due to being close to the foreground galaxy.
An elliptical galaxy
duh were living in a barred galaxy
It's not possible that we could cross a galaxy. But astronomers study galaxies with huge telescopes.
ancient astronomers thought it was spilled milk.
be quit @$$ #**()
Astronomers. They study all things about space.
Observing another spiral galaxy, gives us a good idea about the structure of our own Galaxy.
Astronomers study the Andromeda galaxy to learn more about how galaxies form and evolve, to understand the structure and composition of other galaxies beyond our own Milky Way, and to potentially gain insights into the future fate of our own galaxy.