Directly Meeting With Aliens Horticulture & Zoology UFO Science
As stated above, the distances are huge. Even our closest system α Centauri is 4.7 light years away. With a velocity of 20.874 Km/sec, we can reach it in about 134.991,5 years· or approximately 5400 human generations with 25yrs each generation.
We have to move faster than this, almost on the spot, only then we can travel between the stars. And not to mention the even largest distances of the intergalactic voids.
There are some theories about FTL, but they are not faster than light per se. You cannot win over Nature, but you sure can cheat it. So far the theories have not become reality, as the technology is not there yet. Another very big issue is to overcome the energy-mass that is required for such a travel to be made. Either by conventional means or not.