The "Speed of Light" ...very fast, but rather slow (relatively speaking).
For example, were we to travel to "Proxima centurai" (the NEAREST star to our Sun, at a distance of 4.22 light years) using the best, most advanced technical means at hand...
How long would it take mankind to travel there?
A light year is 5,878,625,373,183.61 (5.8 Trillion) statute miles. So, multiplying by 4.22 that's a total of 24.8 Trillion statute miles.
The spacecraft "Helios", holds the record as the fastest man-made object (a series of two US-German spacecraft, launched in the mid-1970's, to study the Sun). Helios attained the speed of 150,000 MPH (that's 2500 miles per minute).
At a consistent speed of 150,000 MPH (without taking into consideration the time needed to accerate -- and then to slow our spacecraft) ...to reach our closest star, would take 18,879 YEARS!
That's equal to 750 human generations!
Rather disquieting, to say the least. Man is the cause of the ongoing Mass Extinction. Our vulnerable BLUE PLANET (spaceship Earth) must be protected such that it can remain as a safe haven...
And for some time to come...