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- Light-year - Wikipedia
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 9 46 trillion km or 5 88 trillion mi
- What Is a Light Year? Definition and Examples - Science Notes and Projects
The light year or light-year (ly) is a unit of length that is the distance light travels in a vacuum in one Earth year One light year is exactly 9460730472580 8 km (approximately 9 46 trillion kilometers or 9 46 x 10 12 km), which is approximately 5 88 trillion miles
- What is a light-year? | Space
A light-year is a measure of astronomical distance: Light travels through a vacuum at precisely 983,571,056 feet (299,792,458 meters) per second, making a light-year approximately 6 trillion
- What Is a Light-Year? | NASA Space Place – NASA Science for Kids
A light-year is the distance light travels in one Earth year Learn about how we use light-years to measure the distance of objects in space
- What is a light-year? - Science@NASA
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
- What is a light-year and how is it used?? - NASA
A light-year is a unit of distance It is the distance that light can travel in one year Light moves at a velocity of about 300,000 kilometers (km) each second
- What Is a Light-Year? Understanding Cosmic Distances
A light-year is the distance light travels in a vacuum over the course of one year Multiply the speed of light by the number of seconds in a year, and you get the magic number: about 9 46 trillion kilometers, or roughly 5 88 trillion miles
- What Is a Light-year? - HowStuffWorks
To measure really long distances and how fast light travels, astronomers and other scientists use a unit called a light-year To reach the previously mentioned Proxima Centauri, it'd take 4 25 years at light speed
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