Light is "said" to travel at 186,282 miles per second.
The distance that light will travel in one year is 5,874,589,152,000 miles (5.87 trillion). This is one "light year".
In 2017, the fastest craft is said to travel at 35,187.008 mph or 9.774 miles per second but, this craft is said to be around the size of a piano.
At this rate of velocity, it would take such a craft 19,058.93 years to travel one light year.
It is "said" that the Helios 2 reached 157,078 mph or 43.63 miles per second by solar propulsion.
A craft travelling at such a speed would take 4,269.585 years to travel one light year.Like this page Like thelackof.com