You don't use it, it is a unit of measurement.
Buzz Lightyear
a mega lightyear
"Lightyear" is a noun. It is a unit of distance used to measure interstellar space.
A lightyear is a much larger distance.
Lightyear Capital was created in 2002.
Lightyear Capital's population is 20.
Buzz Lightyear
Buzz Lightyear
1 lightyear = 9.46 × 1015 metres
Buzz Lightyear attractions was created in 2005.
Buzz Lightyear "To Infinity and Beyond!!!"Buzz Lightyear .
nope Buzz Lightyear is Tim Allen