A light-year, alternatively spelled light year (ly or lyr[3]), is a unit of length used to express astronomical distances and is equal to exactly 9 460 730 472 580.8 km, which is approximately 5.88 trillion mi.

How many miles are in a light year? Use this easy and mobile-friendly calculator to convert between light years and miles. Just type the number of light years into the box and hit the Calculate button.

2025年1月14日 · One light-year is about 6 trillion miles (9 trillion km). That is a 6 with 12 zeros behind it! When we use powerful telescopes to look at distant objects in space, we are actually looking back in time. How can this be? Light travels at …

2023年4月27日 · Light is the fastest-moving stuff in our universe. It travels at 186,000 miles per second (300,000 km/sec). So, a light-year is 5.88 trillion miles (9.46 trillion km). However, stars and...

2024年12月16日 · That means the distance a beam of light travels during one year here on Earth is about 5.87 trillion miles (9.46 trillion km). The name can be confusing, but it’s essential to understand that a light-year is a unit of distance, not a unit of time.

Light is the fastest thing in our Universe traveling through interstellar space at 186,000 miles/second (300,000 km/sec). In one year, light can travel 5.88 trillion miles (9.46 trillion km). A light year is a basic unit astronomers use to measure the vast distances in space.

2024年4月22日 · Light-year is the distance light travels in one year. Light zips through interstellar space at 186,000 miles (300,000 kilometers) per second and 5.88 trillion miles (9.46 trillion kilometers) per year.