120 light years is the distance that light travels in 120 years. Since one light year is about 9.46 trillion kilometers (or about 5.88 trillion miles), 120 light years is approximately:

• 120×9.46×1012 km=1.135×1015 km120\times 9.46\times 10^{12}\text{ km}=1.135\times 10^{15}\text{ km}120×9.46×1012 km=1.135×1015 km (1.135 quadrillion kilometers)
• Or about 705 trillion miles

In meters, this distance is roughly 1.135×10181.135\times 10^{18}1.135×1018 meters. To put it in perspective, light travels at about 300,000 kilometers per second, so it would take light 120 years to cover this distance. If traveling at the speed of light, a journey of 120 light years would take exactly 120 years. However, at conventional speeds, such a journey would take millions of years. Thus, 120 light years is an immense distance, spanning over a quadrillion kilometers or hundreds of trillions of miles across space