Question

If it takes billions of years for a satellite to get out of milky way galaxy, how do the scientist know what's outside the milky way galaxy and how they look. Because we humans have not existed for more than a million years.

I mean are they fooling us with all the take discoveries?​

Answer 1

Answer:

A composite image of the Messier 81 (M81) galaxy shows what astronomers call a "grand design" spiral galaxy, where each of its arms curls all the way down into its center. Located about 12 million light-years away in the Ursa Major constellation, M81 is among the brightest of the galaxies visible by telescope from Earth.