A light-year is a unit of distance - the distance travelled by light in a year. Light travels 300,000 km in a second, so a light-year is about 9.5 x 1012 (9.5 million million) kilometers.
"Lightyear" is a noun. It is a unit of distance used to measure interstellar space.
lightyear
lightyear.
A lightyear is the distance that light can travel in one year.
a Lightyear, around 1013 kilometres.
Please note that a light-year is a distance. As far as I know, the square root of a distance is not something that makes sense physically - in other words, you can express it mathematically, but it's not a unit used in practice.
Buzz Lightyear is named after Buzz Aldrin, the second person to walk on the moon, reflecting the character's space-themed persona as a heroic space ranger. The name "Lightyear" emphasizes the character's connection to space travel, referencing the unit of distance used in astronomy. Together, the name evokes themes of adventure and exploration in a futuristic setting.
Buzz Lightyear
a mega lightyear
A lightyear is a much larger distance.
Buzz Lightyear
Lightyear Capital was created in 2002.