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A light-year, alternatively spelled light year (ly), is a unit of length used to express astronomical distances and is equal to exactly 9,460,730,472,580.8 km (Scientific notation: 9.4607304725808 × 10 12 km), which is approximately 5.88 trillion mi.
Jun 13, 2024 · A light-year is the distance light travels in one Earth year, about 6 trillion miles. Learn how we use light-years to measure the distance of objects in space and how they relate to time and space.
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. We use light-time to measure the vast distances of space.
Dec 22, 2021 · A light-year is a measurement of distance and not time (as the name might imply). A light-year is the distance a beam of light travels in a single Earth year, which equates to...
May 28, 2020 · The 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 approximately 9.46 trillion kilometers (9.46 x 10 12 km) or 5.88 trillion miles (5.88 x 10 12 mi). The light year is used to describe distances to stars without having to use very large numbers.
Learn what a light-year is, how astronomers use it to measure vast distances in space, and how light shows us the past. Find out how far away the Moon, the Sun, the nearest stars and galaxies are in light-years.
May 13, 2024 · Light-year, in astronomy, the distance traveled by light moving in a vacuum in the course of one year, at its accepted velocity of 299,792,458 metres per second (186,282 miles per second). A light-year equals about 9.46073 × 1012 km (5.87863 × 1012 miles), or 63,241 astronomical units.
